成都市恒大玫德貿易有限公司專業銷售批發四川瑪鋼管件，包括（燃(ran)氣系(xi)統(tong)(tong)(tong)(tong)、消防(fang)系(xi)統(tong)(tong)(tong)(tong)、暖通系(xi)統(tong)(tong)(tong)(tong)、給(gei)水系(xi)統(tong)(tong)(tong)(tong)管(guan)件等），下面是(shi)燃(ran)氣系(xi)統(tong)(tong)(tong)(tong)彎管(guan)的規(gui)格尺寸介紹：