... 消防车 = pumper 消防车 = pumpers 消防队员 = fireman ...
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Wellhead Pumpers 油井水泵操作工
On some pumpers, the rotary counterbalance can be adjusted by shifting the position on the crank arms.
在某些抽油机上，旋转平衡块可由改变其在曲柄臂上的位置进行调整。
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Environmentalists say the pumpers are already trying to postpone cuts.
ECONOMIST: Water, water, everywhere
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