The drain pipe must be the same size as the valve outlet, and must pitch downward from the valve.
排泄管与安全阀出口必须有相同的通径，必须从安全阀开始垂直向下。
Both have the same pitch diameter at the top of the hole of internal threads or end of the pipe on external threads, and both have the same thread lengths or depths.
在内螺纹的孔的顶端或者外螺纹的管的端部拥有相同的中径，而且拥有相同的螺纹长度和深度。
These high precision instruments are more than 20 kinds and widely used for oil industry to measure the monomial parameters of taper, pitch and height screw for oil pipe, canola and drill shank.
肮 该系列产品是广泛应用于石油行业的高精密仪器，共有20多个品种，主要用于石油油管、套管、钻杆锥形螺纹的锥度、螺距、高度等单项参数的测量。
The simulation results indicated that heat pipe diameter, pipe length, tube pitch and fin structure had influence on the efficiency and pressure drop of heat pipe exchanger.
模拟结果表明，热管的管径，管长，管间距和翅片结构均影响热管换热器的换热效率和压力降。
You can be the pitch pipe for your choir, and easily tune string or wind instruments.
你能成为你合唱队的调音器并轻松地调准各种管弦乐器。
You can be the pitch pipe for your choir, and easily tune string or wind instruments.
你能成为你合唱队的调音器并轻松地调准各种管弦乐器。
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