DT-L 蓝盖试剂瓶
DT-BZ-L 应急标志灯
DT-DY-L 型号
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以上来源于: WordNet
ABBREVIATION for diode transistor logic: a stage in the development of electronic logic circuits 二极晶体管原理
dt If you divide both sides by dt, which mathematicians cannot do, but physicists can, then you get /dt=ds/dt d theta/dt equals ds/dt, and v/l that is the velocity divided by l.
如果两边同除以，数学家不会这么做，但是物理学家可以,得到dθ,等于。
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