serial type bell-less top with a central charging hopper
fully-mechanized mining with top coal caving
longwall with top coal caving technology
minor axis semi-rigid connections with top and seat angles
smelting in a stationary unit with top blowing
sufficient contact with top plate
weighing Compensation for furnace top with high pressure
concrete frame column with central reinforcement
current-limiting charging with voltage tracing
earth-rockfill dam with central impervious geomemb
growing up with central section
Theodolite with central telescope
dissolve with heat,flow with the same temperature,elute with warm water
kind of top hollow and top full