drag coefficient
... 叶栅理论 cascade theory 曳引系数 drag coefficient 液氟 liquid fluorine ...
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菲涅耳曳引系数 [光] Fresnel drag coefficient ; fresnel's dragging coefficient
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提升机设计采用了曳引式传动和负力控制技术，关键部位采用双键控制技术，提升了安全系数。
The elevator design has used the haulage type transmission and negative strength control technology, the essential spot USES the duplet bond control technology, has promoted the safety coefficient.
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