砾石排出孔的英文

• gravel pass

• 砾石:    gravel; grail; dirt
• 排出:    discharge; exhaust; squeeze; ...
• 孔:    hole; opening; aperture
• 排出孔:    bleed hole; discharge hole; discharge opening; discharge orifice; escape hole; exhaust opening; outage; outback; outlet hole; outlet opening; outlet orifice; tap hole; tapping arrangement
• 砾石排放孔:    gravel pass