... for month 保留1个月 for mixing and pouring 调酒及倾倒 for months 好几个月以来 ...
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Usage: When pouring into-cement, keeping apart cement mortar and mud and preventing cement mortar from mixing into mud for not influencing quality of well cementation.
产品说明用途：注水泥时，隔离水泥浆和泥浆，防止水泥浆中渗入泥浆影响固井质量。
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