短语词组短語bolt -hole corner crack 螺栓孔角裂紋bolt and hole 栓孔Bolt With Hole 帶孔螺栓Bolt -hole fits 釘孔配郃flange -bolt-hole 法蘭螺栓孔hexagon head bolt with hole 六角頭頭部帶孔螺栓 返回 bolt hole