欧美日韩三级国产在线_99国产精一区二区三区蜜桃 _欧美精品久久久久美臀_中文字幕强奷人妻_熟女人妻久久久一区二区_99re高清无码_无遮挡粉嫩久久久久久久_美女网站黄色免费_国产无遮挡在线免费视频_欧美人禽杂交18禁网站_色窝窝无码精品视频在线观看_久久亚洲免费中文字幕_久久久久久久久久久一级_欧美性猛交久久久久久久_久久99精品视频免费播放

鋼筋連接套筒國標標準

1、         鋼筋連接套筒原材料應該是45號碳結鋼

2、         鋼筋直螺紋連接套筒外徑長度應滿足以下尺寸

規(guī)格                   三級鋼外徑×長度                   四級鋼級鋼外徑×長度

Φ12                           18×28                                   19×32

Φ14                            21×32                                  22.5×36

Φ16                            24×36                                  25.5×40

Φ18                           27×41                                  28.5×46

Φ20                           30×45                                  31.5×50

Φ22                           32.5×49                               34.5×54

Φ25                             37×56                               39.5×62

Φ28                           41.5×62                                 44×68

Φ32                           47.5×70                                50.5×76

Φ36                            53×78                                  56.5×84

Φ40                            59×86                                  62.5×92

Φ50                             74×106                               78×112