单词	acid heat test
释义	acid heat test noun : a test used in petroleum refining for indicating the amount of unsaturated hydrocarbons in gasoline and performed by noting the increase in temperature caused by adding one volume of 93 percent sulfuric acid to five volumes of gasoline in a Dewar flask Word History First Known Use 1917, in the meaning defined above
随便看	pin borer pin bush pin buttock pin cherry pin cloth pin clover pin curl pin down pin drafter pin drill pin eye pin game pin grass pin hinge pin knot pin mark pin money pin oak pin oat pin on pin one's hopes on pin pallet pin perforation pin pool pin punch

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