传统的镀锌钢管和普通排水铸铁管由于易锈蚀、自重大、运输施工不便等原因已逐渐被取代。
The traditional galvanized steel tube and ordinary drainage iron pipe due to easy to rust, since the major, transportation construction inconvenience of reason has gradually be replaced.
传统的镀锌钢管和普通排水铸铁管由于易锈蚀、自重大、运输施工不便等原因已逐渐被取代。
The traditional galvanized steel tube and ordinary drainage iron pipe due to easy to rust, since the major, transportation construction inconvenience of reason has gradually be replaced.
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