For open spread foundation, the pit is excavated by excavators for earth work with manpower to trim the side slope and build the ditch on top of base pit.
明挖扩大基础基坑开挖时，土方采用挖掘机开挖，并由人工配合进行边坡修理、基坑顶面排水沟的修建等辅助工作。
The measuring principle of ultrasonic transducer in open ditch flowmeter is described briefly.
简单叙述了超声传感器用于明渠流量计的测量原理。
Kim easily dealt with hiking along an open sewage ditch, spring with a car tire strapped to her back, floating for half an hour in frigid ocean waters and rolling commando? Style in mud.
沿着露在地面的下水道沟徒步行走，背上绑着汽车轮胎全速奔跑，在冰冷刺骨的海水中漂流半个小时，在泥浆中像突击队队员那样摸爬滚打，这些金都都能应付自如。
Based on hydraulics open ditch uniform flow theory, this paper builds up the formula to calculate the velocity gaging section water level current.
从水力学明渠均匀流理论出发，建立了计算测流断面水位和流量的公式。
Analysis the open ditch and a single material in different forms of isolation barrier effect, and then summed up the vibration-isolation behavior of each material.
分析明沟和不同单一材料屏障形式的隔振效果，总结了每一种材料的隔振行为。
Analysis the open ditch and a single material in different forms of isolation barrier effect, and then summed up the vibration-isolation behavior of each material.
分析明沟和不同单一材料屏障形式的隔振效果，总结了每一种材料的隔振行为。
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