Vacuum breaking valve
作者： John A Brooks
DOI:
关键词: Mathematics 、 Structure (category theory) 、 Type (model theory) 、 Principal (computer security) 、 Mathematical analysis 、 Relation (database) 、 Simple (abstract algebra)
摘要: This invention relates to valve structures and has particular relation a structure of vacuum breaking type, the principal objects being provision type described that is simple in construction, efficient operation relatively economical produce. Objects...
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