----- 斯佩尔曼废水操作员标准手册 卷三
Compact and practical, Spellman's Standard Handbook for Wastewater Operators: Volume III, Advanced Level, Second Edition rounds out the revision of this three-volume set. Together, these three volumes prepare operators to obtain licensure and operate wastewater treatment plants properly. This volume presents applied math and chemistry by way of rea
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