It is important to wear your helmet, even while testing.
重要的是穿上你的头盔，甚至在测试。
A simple testing method of wear resistance for piston ring and cylinder sleeve is introduced.
本文介绍一种简易的活塞环与气缸套磨损试验方法。
A simple testing method of wear resistance for piston ring and cylinder sleeve is introduced.
本文介绍一种简易的活塞环与气缸套磨损试验方法。
应用推荐