等はヘッドねじに細長い穴をつけた

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{"cid":"121964","pid":"22531276","pimg_url":"\/\/img1.b2bforus.com\/7c\/ed\/9a7d15788eb6\/product\/76129638_s-w400xh400.jpg","name":"Special Truss Slotted Truss Serrated Head Machine Screws","attrs":{"\u4fa1\u683c":"Negotiable","MOQ":"1000 Pieces","\u7d0d\u671f":"Negotiable","\u30d6\u30e9\u30f3\u30c9":"TX, TX-L230"}}