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（燃氣(qi)系(xi)(xi)統(tong)(tong)、消防(fang)系(xi)(xi)統(tong)(tong)、暖通系(xi)(xi)統(tong)(tong)、給水系(xi)(xi)統(tong)(tong)管件等），下面是(shi)燃氣(qi)系(xi)(xi)統(tong)(tong)直管的尺寸規格介紹：