By adopting some technology of advanced detection, adding temporary invert, sleeve valve pipe and lock foot bolts, the construction of the tunnel is completed safely and successfully.
暗挖区间隧道通过采用超前探测、增设临时仰拱、袖阀管、锁脚锚管等技术措施，安全、顺利完成了北四环路和北辰桥段的施工。
In general, a foot valve can be mounted if the pump is mounted above the water level of the water inlet so as to start the pump with priming, it can also use the way of vacuum pump water leading.
如水泵安装在进水水位以上时，为了灌泵启动，一般可装底阀，也可采用真空泵引水的方法。
Installations with suction lift require a good quality foot valve to avoid loss of prime - remove in-built check valve.
进水口的安装需要使用一个品质优良的底阀，以避免进水口压力损失-拆除内置式止回阀。
Pig valve broken rear foot with a knife, and then every 1 cm bone Hengkan to blow off even the skin.
将猪后脚用刀破瓣，再每隔1厘米横砍一刀至骨断皮连。
This kind of foot valve features compactness, elegant appearance, high inter-changeability and stable and reliable performance.
本脚踏阀结构紧凑，外表美观，阀的互换性强，性能稳定，可靠。
The lowest level was two sensing system, fixing on foot of the robot, gathering and processing information from multi-kind sensors, and also controlled the pump and valve.
下层为两个足部传感系统模块，分别安装在机器人的两个足上，负责多种传感器信息的采集、处理及泵和阀的驱动控制。
The air-jet exhauster is a compressed air-operated device for pump priming, provided that the pump has no foot valve. Water is induced into the pump by vacuum created by the exhauster.
以压缩空气为动力的气体引射器，它是用在无底阀水泵上的抽气引水设备，具有结构简单、加工制做容易、耗气量小、效率高等特点。
A new type of fitter mesh which is used with pumps foot-valve has been developed.
研制出了一种泵底阀用节能滤网组件，并对其节能机理进行了初步分析。
A new type of fitter mesh which is used with pumps foot-valve has been developed.
研制出了一种泵底阀用节能滤网组件，并对其节能机理进行了初步分析。
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