规格：

WO3	90%Min	As	0.0050	V	0.0010
Fe	0.0030	Pb	0.0005	Ti	0.0010
Al	0.0010	Bi	0.0005	Co	0.0010
Si	0.0030	Sn	0.0010	Mg	0.0010
Mn	0.0010	Na	0.0040	S	0.0050
Ni	0.0010	Sb	0.0010	Mo	0.0100
K	0.0010	Cu	0.0010
P	0.0040	Ca	0.0050	Roasting loss	9.5