... 螺栓孔削角 bolt hole chamfering 螺栓螺纹钉 bolt-screw spike 螺旋曲线 spiral curve ...
基于56个网页-相关网页
罗纹道钉screw spike 螺栓罗纹钉bolt-screw spike 硫磺锚固sulphur cement mortar beneficialchormbeneficial;sulphur cement mortar beneficialchormbeneficialgenersupportion .
基于16个网页-相关网页
·2,447,543篇论文数据，部分数据来源于NoteExpress