The drill has variable speed control.
这钻机有变速控制。
The model of hydraulic motor pump variable speed control system is built.
同时建立了该液压电机泵变速控制系统的数学模型。
Two control ring work together to realize variable speed constant frequency.
运行时机组的两个控制环同时工作，实现变速恒频。
A hydraulic variable speed drive system of shield disk cutter has been designed.
设计了盾构刀盘变转速液压驱动系统。
Electronic variable speed transmission, stable and reliable, long life, low noise.
采用电子级变速传送，稳定可靠、寿命长、低噪音。
Normal bone drill: variable speed control without step, reliable, economical price.
普通骨钻：无级变速，性能可靠，经济实惠。
变速铣头。
Variable speed hydraulic drive system is a new type energy saving system.
变转速液压驱动系统是一种新型的节能传动系统。
Variable speed constant frequency generating system has been used in modern aircraft.
变速恒频电源系统已在现代飞机上使用。
Variable speed constant frequency generating system has been used in modern aircraft.
变速恒频电源系统已在现代飞机上使用。
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