Key words: lignosulfonate； water reducer； structural character； source of raw material； modification [gap=547]关键词： 木质素磺酸盐；减水剂；结构特点；原料来源；改性方法
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source of raw material
原料来源
以上为机器翻译结果，长、整句建议使用 人工翻译 。
The use of isobutanol etherified melamine has widened the source of raw material and reduced the cost.
采用异丁醇醚化三聚氰胺树脂，可开辟原料来源和降低产品成本。
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It passed a resolution telling buyers of tin not to source their raw material from mines controlled by Congolese militia leaders.
ECONOMIST: Failed states
In the Middle Ages it was discovered to be a rich source of aluminium sulphate - a crucial raw material used as a fixing agent in dyeing cloth.
BBC: Time team battles tide
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