drag〔名词〕机动航行与驶帆航行的速度差,拉,拖;n.阻力详细»
drag双刃拖网[ 在岩石、碎石或砂砾海底刮取底质底栖生物样品用的底拖网,由长方形网]详细»
拖运机chain and ducking dog mechanism;drag over unit;hauling machine;pull over gear;transfer gear;transfer handling gear;transfer skid;transfer table详细»
拖运机conveyor;pull over gear;transfer gear;transfer handling gear;transfer skid;transfer table详细»