The utility model relates to a gate valve, in particular to a three-way gate valve for cutting over the current direction.
本实用新型涉及一种闸阀，尤其是一种用于流向切换的三通闸阀。
The uniform speed ring flowmeter has high accuracy, large output differential pressure, uneasy plugging and insensitive current direction.
准确度高，输出压差大，不易堵塞，对流向不敏感。
Three methods to judge the electric leakage of flange are put forward, that is, current direction method, pipeline current method and earth resistance method.
就绝缘法兰是否漏电，提出了电流方向法、管道电流法及接地电阻法等判断方法。
It can be used to determine boundaries of depositional sequence and system tracts, current direction, hydraulic energy and manifold depositional environments.
用它可以确定层序和体系域边界，判断水流方向和水动力大小，识别多种沉积环境。
Being used as a current direction sensor, this compass is suitable for all kinds of current meters required by measuring direction.
此种罗盘可用于各种海流计上作为测向传感器，也可用于其他需测方位角的仪器上。
This paper analyses selectors of transverse differential current direction protection using two types polarizing voltage for double circuit lines on the same tower.
对两种极化电压下的横联差动电流方向保护的选择元件在同杆并架双回线故障下的动作行为进行了研究。
Analyzes the leakage from the asphalt concrete core wall on the river-bed section of Majiagou reservoir from the aspects of temperature, vertical current and current direction.
从温度、垂向流和流向三个方面分析马家沟水库大坝河床段沥青混凝土心墙的渗漏情况。
The phase comparison error is the primary factor leading to mistaken action in the selective leakage protective system of underground LV networks based on zero sequence current direction.
在基于零序电流方向原理的矿井低压电网选择性漏电保护中，比相误差是导致保护误动的主要因素。
The phase comparison error is the primary factor leading to mistaken action in the selective leakage protective system of underground LV networks based on zero sequence current direction.
在基于零序电流方向原理的矿井低压电网选择性漏电保护中，比相误差是导致保护误动的主要因素。
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