... to the polarity is properly to load battery ,if the second hand start to move,proof the sensitivity is high.High sensitivity ... of walking. 4.Checking whether rammer: Turn the hour hand,minute hand and second hand coincide(Three needle are overlapping),three needle should keep ... SMT machines, 10 sets ASM COB machines, 6 sets UNION injection machines, 6 sets mould making machines, 3 sets High Frequency ...