青岛SOP for plate flat welding flange
青岛Blind flange bl
青岛Threaded flange tr
青岛Flat welding flange with neck
青岛Neck butt welding flange
Add: B3 Workshop, Jinze town industrial zone,Qingpu,Shanghai
Tel: 021-59261579
Email: panhy@sh-wakamatsu.com
