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2018年10月
Standardforsheartestofadhesives:TestmethodfortorsionalshearstrengthofGB/T14903-1994inorganicadhesive…
2018年10月
1.Testequipment:1.Thetest-bedshallhaveadevicewhichenablesthewheelstowithstandclockwiseandanticlockwi…
2018年02月
Thetestmediumforthevalvesealtestisusedforthetestofvalvepressure.1.thetestmediumisliquid,thetestpress…
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