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 孔数安装尺寸 外形尺寸 铜件横截面积 
 7 35×7.5 50×21 6×9
 8 35×7.5 57×21 6×9
 10 35×7.5 71.5×21 6×9
 12 35×7.5 84.5×21 6×9
 13 35×7.5 91×21 6×9
 15 35×7.5 104×21 6×9