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