... and our factory introduce high-precision automatic welding machines, laser welding machines and plasma welding machines from Korea, and also imported ... bellows, it also equipped high precision vacuum life test equipment from Taiwan, Varian VS leak detectors from America, ... 316L,SUS 304,AM350,Hastelloy alloy C Haynes alloy 242,Inconel 625 and 718 alloy, titaniumFree lengthOptionalService life100-1,000 ...