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1·The centering accuracy problem is solved by centering of numerical control boring machine and the counterweight balance problem is solved by the fixed counterweight a and adjustable counterweight b.

用数控镗床定心解决了定心精度问题，用固定配重a和可调整配重块B解决了配重平衡问题。

2·By using drilling, milling, grinding, file and other means to remove the quality; Can also change in slot on the balance of the precast counterweight position and quantity.

用钻、铣、磨、锉等手段来去除质量；还可以在预制的平衡槽内改罭变平衡块的位置和数量。

3·If the pumping unit is unbalanced, the counterweight and the crank balance arm can be adjusted according to the formulas presented in this article.

当抽油机不平衡时，可以按文中的公式调整平衡块和曲柄平衡半径。