Nhazi nke bolts hexagon: 1. Dị ka usoro ike nke njikọ ahụ si dị, a ga-ejikọta bolts ejiri maka oghere hinged na nha nke oghere ma jiri ya mee ihe n'ihe gbasara ike ntụgharị; 2, dị ka isi udi nke isi hexagonal, okirikiri isi, square isi, countersunk isi, na ya...
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