... national standard.We have professional fixture and testing tools for many required production which can fit various machinofactures' ... , SCH80, XS, STD, XXS6) Application: Petroleum, Chemical, Power, Gas, oil field, offshore, water system, Metallurgy, Ship- building, etc. ... and skilled QC with record put down.Universal inspection tools: hardness tester, Height ruler, Depth ruler, Outside ruler ...