geological condition type of coal mine

answer back message at the end of his rope balance(d) cylinder boron trifluoride acefic acid complex Chemaze drop ceilings high pitch loudspeaker jump leads liquor thief Montg morlon operating revenue deductions Ould Ben Nasser Bir picosecond (10-12 second) read in unit Relleu silvery-blue synaetosis tanzen vacuum-deposited circuit