榫

• Steel pipe welding neck flanges with tongue and groove face
  榫槽面对焊钢制管法兰
• Finger jointing machines without gluing operation . precision
  梳齿榫开榫机.精度
• Integral steel pipe flanges with tongue and groove face
  榫槽面整体钢制管法兰
• Steel gauges . metric taper plug gauges with tang
  钢制量规.米制榫式锥度塞规
• Steel gauges . metric taper ring gauges with tang
  钢制量规.米制榫式锥度环规
• Driving square for hand operated socket wrenches
  手动套筒扳手传动方榫和方孔
• Steel gauges . morse taper plug gauges with tang
  钢制量规.榫式莫氏锥度塞规
• Steel gauges . morse taper ring gauges with tang
  钢制量规.榫式莫氏锥度环规
• Hand operated socket wrenches - driving squares
  手动套筒扳手传动方榫和方孔
• Wood . assembly . multiple finger joints . flexion test
  木材.组装.多榫接头连接.弯曲试验