The chaff fired two phase boiler realizes overall process mechanized operation from feeding to tapping and reduces labor strength;
它实现了进料到出渣全过程的机械化操作，降低了劳动强度；
Multiple spindle tapping unit produces high efficiency operation.
多轴攻牙器的配置能产生高效率的作业。
This paper discusses on characterstic of tapping chucks from the point of view of operation principle and manufacture technipue.
简要的介绍了安全攻丝夹头的结构特点、工作原理、安全可靠性等问题，并说明在生产实践中的应用效果。
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