When your main drive needs looking at, you just swap them around.
要看主驱动时,只需切换它们。
Ji maintained that "Cultural exchange is the main drive for humankind's progress."
季羡林认为,“文化交流是人类进步的主要动力之一。”
The main drive chain and the bearing chain divide the polished rod load into reverse pumping load and equilibrium load.
主传动链与承载链将悬点载荷分解为换向抽汲载荷与平衡载荷。
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