发布时间:2025-01-19 22:22:37
按照标准规范,
镀锌钢管变径一般要按照标准规范,
暖气主立管用镀锌钢管焊接,
DN150的管径,
变径参照GB/T 12459-2017。
门面是已经开了三年了因为时间比较久东西不能用所以重新装修一下现在城管来说装修也要申请要收
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