液黏离合器
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All eyes were fixed on a narrow test tube — two-thirds filled with a viscous black liquid — clamped between two couplings on the machine.
所有的目光都集中在一个狭窄的试管上,里面三分之二装着黑色的粘性液体,试管被夹在机器的两个联结器之间。
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