J&J Precision Parts Co., Ltd

we are professional supplier of sapphire window, wafer, substrate, ignot, jewel bearings, cup jewel, orifice shaft, pivot, hairspring, magnet for water meter. and ruby made by Kyropolus, EFG、Verneull. ...

Telephone：86-512-62855017Address：JINJIHU AV., Suzhou, Jiangsu, China