... 平行滑动闸阀 parallel slide gate valve 并联弹簧 parallel springs 平行条 parallel strip ...
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Suppose, now, I have two of these rods - next to each other-- notice the parallel - with the two parallel springs here-- F and I apply a force F.
假设现在，把这两个棒子,并联紧贴放置-,注意，它们就像,这里的弹簧一样平行-,施加力。
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