国精产品一区一区三区,97久久精品无码一区二区,欧美老妇大P毛茸茸,两根黑人粗大噗嗤噗嗤视频

??????ù?|?????豸????????|??????????ù?

??????ù?

??????????ù??GB6479-2000??????????豸??????????????????????豸???????????????????????????20??16Mn??12CrMo??12Cr2Mo???
??????????ù??GB6479-86?????????????????-40~400?楨????????10~30Ma??????豸?????????????????????????
?????????豸?????????GB6479-86?????????????????-40~400?楨????????10~30Ma??????豸??????????????????????????
???????????????硢?????????????????????????????Q235A??B?????GB/T14980-1994????????????????????紙????????ˉ?????????????????????ú???????????????????????????????????????????Q235A?????

??????????ù??????????

121??6-7-8-10-12-14-16-20	273??30-35-38-40
127??-6-7-8-10-12-14-16-20	299??8-12-16-20-24-28
133??6-8-12-14-16-18-20-25-30	299??30-32-36-38-40
140??6-7-8-9-10-12-14-16-20-22	325??8-12-14-18-38
146??6-8-12-14-16-18-20-25-30	325??28-32-34-38
152??6-8-12-14-16-18-20-25-30	351??10-16-20-25-40
159??6-10-12-14	355??6-18-20-25-30-40
159??16-18-20-22-25-30	377??8-12-15-20-24-28
168??8-10-12-14-20-25-30-35	377??30-37-40
180??8-12-16-25-30	402??10-15-20-25-30-35
180??32-34-38-40	406??10-20-25-28-35-40
194??6-8-12-16-20-25-30-40	426??10-12-14-16-20-25-30-35-40