BM微生物制剂是一种高效、新型、无毒、无害、无二次污染的复合型微生物制剂。它不仅可以消除恶臭，还可抑制苍蝇的滋生。实际应用效果可达到相关标准要求。

BM microorganism composite is a sort of high efficiency, innocuity and no pollution microorganism composite. It can remove the effluvium and flies, and comply with the standards in practice.

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但净扭矩曲线存在负值，建议增加曲柄二次平衡，设计成复合平衡型抽油机。

But net torque curve of crankshaft exists negative . The compound balance beam pumping units is put forward.

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