和田玉高脂份青玉留皮手镯

硬质钨钢球合金球53.83/53.835/53.84/53.845/53.85/53.855mm钢珠

硬质钨钢合金挤53.835/53.84/53.845/53.85/53.855mm扩孔球孔钢球