We specialize in custom precision machinery parts. 1.Certification:ISO9001 2. Drawings Accepted 3. ... in produce all kinds of precision machinery parts(nuts,bolts,fasteners,washers,pipe fitting,washers,etc),our products are widely used ... ,roughness tester,impact test machine,pressure tester,altimeterWe can provide Custom Fabrication Services ,you are welcome to send your technology drawings ...