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娉ㄦ伎澹撳姏锛�5. 0mpa
鏀媽閲忥細4-5m3/h
瑷�(sh猫)鍌欓噸閲忥細0.8-1T
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娌冲寳鎷遍爞娉ㄦ伎涓€楂旀(j墨)銆�
For the conventional span tunnel with small diameter pipe shed (diameter less than 159mm), during the excavation, the pipe roof is basically. shall not exceed + 5cm, and the allowable error of the verticality is + 2cm. sales of less and less, in the inbation network today, if not with the network inbation are still clinging.
