规格型号型号量程可读性重复性线性称盘尺寸电源JA-120120g0.001g 0.001g 0.002g￠120mm220V/50HzJA-210210g0.001g 0.001g 0.002gJA-310310g0.001g 0.001g 0.002gJA-410410g0.001g 0.001g 0.002gJA-500500g0.001g 0.001g 0.002gJA-12001200g0.01g 0.01g 0.02g￠160mm220V/50HzJA-21002100g0.01g 0.01g 0.02gJA-31003100g0.01g 0.01g 0.02gJA-41004100g0.01g 0.01g 0.02gJA-50005000g0.01g 0.01g 0.02g