欧美精品黄,亚洲第一男人天堂,亚洲二区中文字幕

BRASS;
COPPER-zinC alloy;
BRASS;
COPPER-zinC alloy, CA. 70/30 POWDER,-60 MESH;
Brass foil, alloy 260, 0.13mm (0.005in) thick, 15x45cm (5.9x18in);
Brass powder, alloy 260, -325 mesh, 99.9% (metals basis);
Brass foil, alloy 260, 0.51mm (0.02in) thick, 15x45cm (5.9x18in);
Brass foil, alloy 260, 0.25mm (0.01in) thick, 15x45cm (5.9x18in);
Brass foil, alloy 260, 0.025mm (0.001in) thick, 15x45cm (5.9x18in)

CuPbZn

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