The development trends of water base, non-water base and holt melt adhesives for carpet backing are described.
简介了水基型、非水基型、热熔型等地毯背衬胶粘剂开发动向。
Gold refineries and dealers worked feverishly to melt down 400 oz "good delivery" bars backing exchange traded funds and futures contracts.
黄金精炼商和交易商卖力熔炼作为交易所交易基金(etf)和期货合约标的的400盎司“标准交割”金条。
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