自进，读音是zì jìn，汉语词语，意思是自谋仕进。
自进式钻头由旋转喷嘴、钻屑整合装置、推力提供装置等组成。
The self-feeding bit consists of the rotary nozzle, the cutting conformity device and the power supply device etc.
自进式钻头带动为其提供高压水动力的特制胶管向前连续钻井。
The self-feeding bit carries the special rubber tube that provides high-pressure hydrodynamics for the bit to drill continuously.
旋转射流与普通射流的反冲力的大小是影响自进式水射流系统自进力大小的关键。
The counterforce size of rotaty water jet and ordinary is a key which influence the propulsion of the self-propelled water jet.
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