automatically operated valve,self-acting valve;self-action valve；automatic valve

Presents the auto valve of O 2 pipe line in Shell gasification process,discusses its function,existing problems,test results and puts forward proposals for improvemen

介绍谢尔气化工艺氧气管线自动阀门的功能、存在的问题、试验结果及改进建议。

Application and research of the automatic ultrasonic inspection system for ship butt weld;

自动超声探伤系统在船体对接焊缝检测中的应用研究

Control system for large and full-automatic quick analysis lab;

大型全自动快速分析室控制系统

Intention of A Minitype Automatic Lathe of A Bearing with Groove Ferrules;

小型轴承套圈沟槽自动车床的研制