承载链直接承受平衡载荷，可大幅度减小主传动链的受力。

The bearing chain bears the equilibrium load to reduce the force on the main drive chain to a great degree.

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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。

The main drive chain and the bearing chain divide the polished rod load into reverse pumping load and equilibrium load.

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链结子为换向机构，具有滑动轴承功能，并联循环链和主传动链，把循环运动变为上下往复运动。承载链直接承受平衡载荷，可大幅度减小主传动链的受力。

The chain link is the reverse mechanism, functions as sliding bearing and makes the cycle chain and main drive chain parallel to change the circulation into reciprocation.

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