Report - (4) 鉄 蓋 類 - Sapporo...※JIS B 0403:1995 鋳造公差等級 CT9～10 141 図表4－2－1 鉄蓋（孔有：標準型） 142 図表 4－2－2 143 図表 4－2－3 寸法・許容差表

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