The hydrogenation process has the more advantages on environment protection than iron powder method, and has better quality.
试验数据表明，加氢法比铁粉还原法的产品质量好，且在环保方面有优势。
The processing technology of electroless copper plating on graphite powders by iron powder method and formaldehyde method were studied and evaluated.
研究比较了两种化学方法——铁粉法和甲醛法在石墨粉表面镀铜的工艺。
Methods Fresh milk method together with traditional lyophilization method and common milk powder method were applied to preserve 86 strains of gonococci.
方法用鲜奶法、普通奶粉法和冷冻真空干燥法三种方法同时保存86株淋球菌。
The family of zeolites that can be synthesized by the new dry powder method was extended from pentasil zeolites to sodalite having the structure composed of 4- and 6-member rings.
用新颖的干粉方法合成系列沸石的研究已从五元环沸石延伸到具有四元环和六元环的方钠石。
The family of zeolites that can be synthesized by the new dry powder method was extended from pentasil zeolites to sodalite having the structure composed of 4- and 6-member rings.
用新颖的干粉方法合成系列沸石的研究已从五元环沸石延伸到具有四元环和六元环的方钠石。
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