The lead salt and calcium salt are effective activators in the metal ions activation flotation by the anionic collectors.
阴离子捕收剂反浮选时，铅盐和钙盐是浮选铝硅酸盐较理想的活化剂。
Effect of some inorganic lead salt and aluminium oxide on burning rate pressure exponent and temperature sensitive coefficient of polyurethane composite solid propellant have been investigated.
研究了某些无机铅盐和氧化铝对燃速压力指数及温度敏感系数的影响。
Natural Resources: coal, sulfur, copper, natural gas, silver, lead, salt, zinc, magnesite, lignite, crude oil.
自然资源：煤、硫磺、铜、天然气、银、铅、盐、锌、菱美矿、褐煤、原油。
Natural Resources: coal, sulfur, copper, natural gas, silver, lead, salt, zinc, magnesite, lignite, crude oil.
自然资源：煤、硫磺、铜、天然气、银、铅、盐、锌、菱美矿、褐煤、原油。
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