This is true, radiating and self-feeding happiness and productivity… and it all begins with self-knowledge and self-awareness — not from the study of others’ habits.
幸福和快乐可以自己满足，这是真的！ 你只要有这样的感觉和意识--而不是学别人的习惯。
2
The self-feeding bit consists of the rotary nozzle, the cutting conformity device and the power supply device etc.
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。
3
The self-feeding bit carries the special rubber tube that provides high-pressure hydrodynamics for the bit to drill continuously.