21
2013-12
03
2013-12
不锈钢法兰的标准
hebftc
规格:1/2~80(DN10-DN5000) 压力等级:0.25Mpa ~250Mpa(150Lb ~2500Lb) 常用标准: 国标:GB9112-88(GB91131-88~GB912336-88) 美标:ANSI B16.5 ,ANSI...
01
2013-12
26
2013-11