And this has to do with the same darn alloy six hundred. Now just imagine a bottom mounted instrumentationtube leaking.
这一定与相同的织补合金600有关，现在，想象一个底部装置的，仪表装置管道泄露。
2
This paper compares instrumentation valves and tube fittings with domestic and abroad and introduce the structure of instrumentation valves and tube fittings in common use at abroad.