气密性试验
air tight test
gas-tight test
leakage test
tightness test
gas-tightness test
air tightness test
air-tight test
leak tightness test
air pressure test for tightness
gas leak test
airtight inspecting
测试性试验
testability demonstration
腐蚀大气测试器
corrosive atmosphere tester
高气密性铝合金铸件
High gas-tight aluminum castings