hexagon socket head shoulder screws 中文意思是什麼
hexagon socket head shoulder screws
解釋
內六角圓柱頭軸肩螺釘-
Hexagon socket head shoulder screws metric series
米制系列內六角軸肩螺釘 -
Hexagon socket head shoulder screws
六角凹頭有肩螺釘
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