孔齐 [元]（约公元一三六七年前后在世）字行素，号静斋，曲阜人。生卒年均不详，约元惠宗至正末前后在世。父退之为建康书掾，因家溧阳。
提出黄河宁蒙段的十大孔兑、库布齐沙漠及毗邻的砒砂岩地区是黄土高原水土流失最严重的地区。
Kongduis (small river formed by ice flowing), Kubuqi Desert and the adjacent zone are an area where the soil and water lose most seriously in Loess Plateau.
公母端内孔平齐的设计使得油气在传送过程中不会发生紊流现象，减小传输阻力。
The design of flush inner holes at male and female ends enables the oil gas not to be subject to turbulence in the transmission process, and reduces the transmission resistance.
当立刀片磨短后，通过调距卡孔有两次调齐，以提高效率。
When the upright cutter blades are abraded and shortened, the upright cutter blades can be justified again through distance adjusting clamp holes for improving efficiency.
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