供应防�圈
t the performance index of the ZHQ fire barrier ring accorded with the
de-mands,and better than the products of the same kind.
主�技术性能 Main technical nperfommances
è§„æ ¼åž‹å�·
Type and specification
尺寸Size
使用管径
Suitable Caliber
备注
Remark
内径l
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