In lesson two, I show how I automated the leg's innerpiston using the distance tool and a simple expression.
在第二课中，我表明我如何自动化腿的内活塞使用距离工具和简单的表达。
2
Our company is a professional salt core (for inner cooling gallery of aluminum piston) producer in China with abundant funds and technical advantages in the production of salt cores.
我公司是中国国内专业（铝活塞内冷油道）盐芯生产商，在盐芯的生产上拥有雄厚的资金和技术优势。
3
Teflon Piston-ring integrated with piston, not only reduce the friction and noise, but also avoid inner-leakage.