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选用水合肼—液碱法制备单质银，还原效果与水合肼—氨水法相近，但操作环境大大改善，有利于操作人员的身体健康，提高劳动生产率。
Hydrazine hydrate - liquid alkali method was used to prepare elemental silver. The reduction effect was similar to hydrazine hydrate - ammonia method, but the operating environment was greatly improved, which was good for operators’ health and labor productivity.