Izwe laseHunan likhiqiza lonke uhlobo lwe-BS1139 Consafling Couplers enezithombe eziphakeme zekhwalithi ephezulu ye-Q235B eluhlaza.
Ama-Coupler angama-BS 1139 afaka i-coupler ehleliwe ephindwe kabili, i-couplel ephindwe kabili, i-beam coupler, i-coupler ye-ladder, i-coupler yamakhowe nokunye.
Isikhathi sePosi: Meyi-09-2021