Zhou Zheng has pointed out that one TLV mirror dating to the reign of Wang Mang ( 9 – 23 ) has an inscription that includes the words " Carved with a Liubo board pattern to dispel misfortune " ( 刻具博局去不羊 ), which suggests that the main purpose of the Liubo pattern on mirrors was ritual, and that the pattern had a special significance beyond game-playing.

The TLV value for 3-pentanone is 200 ppm ( 705 mg / m < sup > 3 </ sup >).

TLV mirrors also date from the Han dynasty.

This structure is closely related to the type-length-value ( TLV ) representation.

* Type-length-value ( TLV ) representation.

Israel has 48 airports, the largest and most well known being Ben Gurion International Airport ( TLV ) located near Tel Aviv, which is used by most international flights to Israel.

There have been several attempts to reconstruct the rules of the game, most notably by Lien-sheng Yang, who discusses the game as it was possibly played on TLV mirrors.

The pattern found on the surface of Liubo boards is also found on the most common type of Han Dynasty bronze mirror, known from their distinctive markings as TLV mirrors.

The term " Threshold Limit Values ( TLV )" was introduced in 1956.

The details contained in these announcements is easily extended due to the use of the type-length-value ( TLV ) frame format.

TLV is defined as the maximum concentration in air which can be breathed by a normal person ( i. e., excluding children, pregnant women, etc.

The threshold limit value ( TLV ) of a chemical substance is a level to which it is believed a worker can be exposed day after day for a working lifetime without adverse health effects.

The TLV is an estimate based on the known toxicity in humans or animals of a given chemical substance, and the reliability and accuracy of the latest sampling and analytical methods.

The TLV is a recommendation by ACGIH, with only a guideline status.

The TLV for chemical substances is defined as a concentration in air, typically for inhalation or skin exposure.

The TLV is equivalent in spirit, although the materials covered, values recommended, and definitions used can differ, to the following concepts.

** TLV club is the name of one of the largest nightclubs in Tel Aviv, Israel.

* TLV ( company ), a Japanese Engineering Company.

A TLV mirror is a type of bronze mirror that was popular during the Han Dynasty in China.

They are called TLV mirrors because symbols resembling the letters T, L, and V are engraved into them.

The first mirrors with TLV symbols appeared during the 2nd century BCE, with some believing that they were related to Liu An's astrological and cosmological interests.

The dragon was an important symbol of these early TLV mirrors.

Scholars are engaged in a debate as to what the symbols on TLV mirrors mean.

The institution is listed on the Bucharest Stock Exchange ( tag TLV ).

Strictly speaking, TLV is a reserved term of the American Conference of Governmental Industrial Hygienists ( ACGIH ).

Some scholars believe that the design of TLV mirrors is derived from an ancient Chinese boardgame called liubo, which was played on a square board with the same TLV markings as this type of mirror.

The Minotaur II, also known as Chimera and TLV, is used for suborbital flights, often as a target for tracking and anti-ballistic missile tests.

** TLV, as the IATA Airport Code for Ben Gurion International Airport near Tel Aviv

* TLV, as the share symbol for Banca Transilvania ( Romania ) stock

* 1944 – Uli Derickson, Czech-American flight attendant, TWA Flight 847 survivor

* 1960 – 1960 New York air disaster: While approaching New York's Idlewild Airport, a United Airlines Douglas DC-8 collides with a TWA Lockheed Super Constellation in a blinding snowstorm over Staten Island, killing 134.

* 1974 – TWA Flight 514, a Boeing 727, crashes northwest of Dulles International Airport killing all 92 people on board.

* 2001 – Captain Bill Compton brings Trans World Airlines Flight 220, an MD-83, into St. Louis International Airport bringing to an end 76 years of TWA operations following TWA's purchase by American Airlines.

* 1956 – A TWA Super Constellation and a United Airlines DC-7 collide above the Grand Canyon in Arizona and crash, killing all 128 on board both planes.

* 1985 – Thirty-nine American hostages from the hijacked TWA Flight 847 are freed in Beirut after being held for 17 days.

* 1942 – Crash of TWA Flight 3, killing all 22 aboard, including film star Carole Lombard.

* 1996 – TWA Flight 800: Off the coast of Long Island, New York, a Paris-bound TWA Boeing 747 explodes, killing all 230 on board.

* 1931 – TWA Flight 599 crashes near Bazaar, Kansas killing 8 including Knute Rockne, head football coach at the University of Notre Dame

* On 17 July 1996 Trans World Airlines Flight 800 ( TWA 800 ), a Boeing 747 – 131, exploded and crashed into the Atlantic Ocean near East Moriches, New York, killing 230.

* September 8 – TWA Flight 841 crashes into the Ionian Sea 18 minutes after take off from Athens, after a bomb explodes in the cargo hold, and kills 88 people.

* December 1 – A Boeing 727 carrying TWA Flight 514 crashes 25 miles ( 40 km ) northwest of Dulles International Airport during bad weather, killing all 92 people on board.

* June 30 – A TWA Lockheed Constellation and United Airlines Douglas DC-7 collide in mid-air over the Grand Canyon in Arizona, killing all 128 people aboard both aircraft in the deadliest civil aviation disaster to date ; the accident leads to sweeping changes in the regulation of cross-country flight and air traffic control over the United States.

* September 6 – Dawson's Field hijackings, The Popular Front for the Liberation of Palestine hijacks 4 passenger aircraft from Pan Am, TWA and Swissair on flights to New York from Brussels, Frankfurt and Zürich.

On April 19, 1944, the second production Lockheed Constellation, piloted by Howard Hughes and TWA president Jack Frye, flew from Burbank, California, to Washington, D. C. in 6 hours and 57 minutes ( 2300 mi – 330. 9 mph ).

* Conrad Hilton, Jr. ( 1926 – 1969 ), business executive and TWA director, heir of Hilton Hotel chain

One pier of the main terminal ( now Terminal A ), which mainly housed American Airlines and Pan Am, was demolished ; the other pier, originally designed for Northwest / TWA remains operational today as gates 1 – 9.

By the late 1980s, Audiotex and Interactive Voice Response ( IVR ) techniques pioneered by VMI became global standards for businesses communications. Data Communications, November 1986 – Audiotex: The Telephone as Data Access Equipment. Modern Office Technology, March 1986 – Voice Soars at TWA.

By the early 1960s, excluding Aeroflot, BEA carried more passengers per year than any other airline in Europe ; worldwide ( excluding Aeroflot and the Civil Aviation Administration of China ), only the " Big Four " US airlines – American Airlines, United Airlines, Eastern Air Lines and TWA – carried more.

* December 16, 1960 – Mid-air collision between TWA Flight 266 ( inbound to Idlewild Airport, now JFK ) and United Airlines Flight 826 ( inbound to LaGuardia Airport ) over Miller Field, Staten Island.

* December 29, 1975 – A bomb explodes in the baggage claim area of the TWA terminal at LaGuardia Airport, killing 11 and injuring 74.