孔的

• The stability of a borehole in an elastic - plastic medium
  弹塑性介质中井孔的稳定性
• Tube valves ; screw - on large bore convertible valve 105
  内胎气门.大孔的旋接105型气门
• Trigger snap with fixed square eye and round eye
  带固定方孔和圆孔的触发锁扣
• Screen plants - codification for designating perforations
  筛板筛孔的标记方法
• The cold extrusion forming for the hole of ring gear
  齿环内孔的冷挤压成形
• Manhole tops classes a 15 and b 125 , circular ; covers
  . a级15和b级125圆形人孔的顶部.盖
• Turnbuckles with oval eyes , double lugs and round eyes
  带椭圆孔和带双耳圆孔的螺旋接头
• Floor drains class l 15 with cleaning eye - summary
  带清洗孔的l15级地面排水管.一览表
• Cheese head , waisted shank bolts with wire holes on head
  头部带保险孔的不脱出圆柱头螺钉
• A device for making holes in some kinds of data media
  在某种数据媒体上作孔的一种设备。