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发明名称
摘要
申请公布号
JPS526807(B2)
申请公布日期
1977.02.25
申请号
JP19720120321
申请日期
1972.12.02
申请人
发明人
分类号
E03C1/086;E03B9/02;F16K47/00
主分类号
E03C1/086
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