Barrel (unit) continued to use the same size barrels. In the worldwide oil industry, an oil barrel is defined as 42 US gallons, which is about litres or 35 imperial gallons. Oil companies that are listed on American stock exchanges typically report their production in terms of volume and use the units of bbl, Mbbl (one thousand barrels), or MMbbl (one million barrels) and occasionally for widest comprehensive statistics the Gbbl (or sometimes Gbl) denoting a billion. There is a conflict concerning the units for oil barrels (see ). For all other physical quantities, according to the International System of Units, the
Barrel bombs in Palestine and Israel Three of the attackers were killed and two taken prisoner [see image right]. Meanwhile, in the oil port of Haifa, where the first barrel bomb had been used in September against the British, Irgun turned the weapon against Arab civilians. On December 30, 1947, Jewish assailants rolled a barrel bomb from the back of a fast moving taxi into a group of Arabs waiting in line to enter an oil refinery where they were employed. The refinery employed Jewish and Arab workers and after the bombing distraught Arabs "went berserk". They killed fellow workers by beating, stabbing and kicking them