词汇	ditch grade
释义	ditch grade 沟底坡底
随便看	pneumatic pick mining pneumatic pier pneumatic piezoelectric proportion valve pneumatic piezometer pneumatic pile pneumatic pile driver pneumatic pile drivercompressed-air pile driver pneumatic pile extractor pneumatic pile hammer pneumatic pillow pneumatic pipe lift pneumatic pipeline pneumatic pipeline pig pneumatic pipe logistics delivery pneumatic pipe-rammer pneumatic piping pneumatic piston pneumatic piston actuating mechanism pneumatic piston actuator pneumatic piston brake pneumatic piston gauge pneumatic piston motor pneumatic piston positioner pneumatic piston servodrive pneumatic piston servo-drive