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  1. 你好,你的工程是新建还是改造,新建,1.挖沟2.中砂垫层,3.UPVC 管道.4.回填土.5.人行道铺设,6.外运土,改建,1.拆除人行道,2.挖沟3.中砂垫层4.UPVC管5.回填土6.人行道铺设7.外运土,8希望能够帮助你请采纳

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