【物理】从装料平衡的滑道中控制滴液馈给的主进给襟翼

main switchboard

main part of root and short rhizome

main vein

main control room

main feed flap for dribble-feed control from silos for filling balances

Aconite Main Tuber and Halloysite Pill

travel of main slide【机】

gas main