... 1.high quality 2.easy to operate 3.low price 4.long working life Coal Mining Shaft Sinking Winch ... pump ,water pipe, grouting pipe, wind-cone, etc. during sinking operation on vertical shaft of coal ,metal and nonmetallic mine.Also this series ... ore, non-metallic tunneling engineering of the borehole vertical suspension DiaoPan, water pump,, hair dryers, compressed air cylinder, grouting pipe etc ...