Explosion -proof hand stubburies are divided into different levels

Two -level explosion -proof hand pour gourd hood (H65 brass) hook, sprocket wheel, is made of aluminum bronze, and other accessories are composed of copper plating

Three -level explosion -proof hand pour gourd hood (H65 brass) hook, bracelet zipper (H62 brass) takes heavy wheels, passes the wheel aluminum bronze, and other accessories are plated by copper

Fourth -level explosion -proof hand pour gourd shell (H65 brass) hook, the zipper (H62 brass) starts the heavy wheel, cross the wheel, cruise ship, the sprocket is aluminum bronze, upper and lower splint stainless steel, other accessories copper plating composition