The engagement state managing device of pipe joint structure, seal member, the engagement state management method of pipe fitting and pipe fitting
The engagement state managing device of pipe joint structure, seal member, the engagement state management method of pipe fitting and pipe fitting
- CN 105,593,591 B
- Filed: 09/29/2014
- Issued: 09/18/2018
- Est. Priority Date: 10/09/2013
- Status: Active Grant
- EN CH
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- Pin
