... Dry-Mix Gunite Machine for Coal Mine 1,Explosion-proofing motor 2,simple structured 3,high-effective 4,long service life Dry-Mix Gunite Machine for Coal Mine Shotcrete machine ... Dry-Mix Gunite Machine for Coal Mine with features: 1,Advantages:This is a high-effective shotcrete machine,which is mainly used for dry-mix, damp-mix ... . size20mm20mmHose inner size51mm64mmOperating air pressure0.4~0.6MPa0 ...