在曲柄平衡抽油机上平衡块位于旋转的曲柄上，而在游梁平衡抽油机上平衡块位于井的相对一端的游梁上。
It is located on a rotary crank on a crank-balanced pumper and can also be located on the walking beam on the end opposite the well on a beam balanced pumper.
固定于游梁式抽油机游梁端部的钢板。
The steel plate that is attached to the end of the walking beam on a beam pumping unit.
一旦你做完下沉练习，再尝试一些容易的游泳技巧，慢速游并想象你有一整天才能游到另一端。
Once you have performed your sink-downs, try some easy laps of swimming. Swim at a slow pace and imagine you have all day to get to the other end.
一旦你做完下沉练习，再尝试一些容易的游泳技巧，慢速游并想象你有一整天才能游到另一端。
Once you have performed your sink-downs, try some easy laps of swimming. Swim at a slow pace and imagine you have all day to get to the other end.
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