Pressplunger down briskly while breathing through nose.
向下轻快按柱塞，伴随呼吸通过鼻子。
2
The crack in quenching boundary of the hydraulic pressplunger surface was analyzed by means of chemical composition analysis, microstructure examination and microhardness testing.
采用化学分析、金相检验和显微硬度梯度试验等方法对油压机柱塞表面淬火交界处裂纹进行了分析。
3
By adopting the automatic submerged arc welding process, the main plunger which surface has been worn out on the heavy duty hydraulic press has been successfully repaired.