18种元素混标（B,Na,Mg,Al,K,Ca,Ti,Cr,Mn,Fe,Co,Ni,Cu,Zn,Zr,Ag,Pb,Bi）
18 mixed elements (B, Na, Mg, Al, K, Ca, Ti, Cr, Mn, Fe, Co, Ni, Cu, Zn, Zr, Ag, Pb, Bi)
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存储：常温,避光
