资料来源 : pyDict

定位桩; 履齿; 轮爪

资料来源 : Webster's Revised Unabridged Dictionary (1913)

Grouser \Grou"ser\, n. ({Dredging}, {Pile Driving}, etc.)
   A pointed timber attached to a boat and sliding vertically,
   to thrust into the ground as a means of anchorage.