1.Air hole punching machine 2.Air holes / air bag butterfly hole ... , drawbar, etc Air Butterfly hole punching machine Air hole / butterfly hole punch machine, the national standard type specification 25 * ... 6 * 9mm/30 * 6 * 9mm, used in making machine, etc. Air holes / air bag butterfly hole punch for plastic ... , products can be thrust 0.02mm thick single-layer plastic material, speed up to 280 times / ...