您要查找的是不是:
- 孔hole
- 冲孔punching
- 孔夫子Confucious
- 开孔portiforium
- 孔板pore plate
- 螺孔screw
- 内孔endoporus
- 通孔pylome
- 人孔manhole
- 微孔millipore
- 安装孔open holes
- 圆孔round orifice
- 网孔mesh
- 螺纹孔tap hole
- 扩孔hole slash
- 预留孔foreseen hole
- 排水孔osculum
- 缩孔shrinkage cavity
- 孔口orifice
- 沉孔counter bore