Countersunk Flat Head Screw, Countersunk Raised Head Screw, Hex Head Cap Screw分别是什么紧固类型.还有,Hex Head Bolt ,Hex Head Screw, Hex Socket Countersunk Hex Screw ,Hex Socket Head Cap Screw.

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Countersunk Flat Head Screw, Countersunk Raised Head Screw, Hex Head Cap Screw分别是什么紧固类型.还有,Hex Head Bolt ,Hex Head Screw, Hex Socket Countersunk Hex Screw ,Hex Socket Head Cap Screw. hea hea的hea是什么意思 hea的hea是什么意思 flat flat flat flat Flat flat hea是什么意思 hea是什么意思? hea是什么意思? 英语翻译tapping screw pan head (din 7981) PH drive materil c1022 size 3.5x9.5mm ,4.2x9.5mm ,4.213mm flat countersunk head tapping screw (din 7982) PH drive material c1008 size 3.2x13mm dry wall screw 3.5x20-25-30-35-40-45-50mm material c1018 PH d 淘宝网店怎样开?hea hea sa lang hea hea粤语怎么读 hea粤语怎么读