... drag hysteresis 拖曳滞后 drag length 可控震源组合长度 drag line 拉铲挖掘机；拉索 ...
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effective length of drag line 有效缆长
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The molecules are then sorted according to their length by using an electric current to drag them through a gel (small molecules move faster than big ones) and the order of the colours in the gel is read off, using a laser.
ECONOMIST: Genetic warfare
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