dual valve type是什么意思 dual valve type怎么读
dual valve type的用法和样例
- Double Check Valve Assemblies shall consist of two positive seating check valves located between two resilient seated shutoffs with four ball valve type test cocks.
这种双止回阀总成应该由两个正向密封止回阀，夹在两个弹性阀座关闭阀之间，并配置四个球阀型测试旋塞构成。
展开更多
