Vacuum tube encryption arrangement looks easy, it is very difficult, the main problem is a liner tube hole connection is too narrow after the processing difficulty, easy deformation.
真空管加密排列看起来容易，做起来是很难的，主要问题一是内胆管孔连接处过窄后加工难度大，极易变形。
2
Cylinder liner is the main part of maritime shipping diesel engine, its operating well or not influences on the performance of the diesel engine.
气缸套是船舶柴油机的主要部件，其工作的好坏直接影响着柴油机的性能。
3
Our country is rich in tungsten resources. Taking tungsten as the main alloy element, tungalloy white cast iron liner is developed.