中心线

In this article, according to the practicle experience of mill design and construction, the author puts forward the experience and problems to be paid attention to about prereserving and pre-embeding work during loom arrangement and equipment installation, including how to arrange posts and looms, how to handle the errors of the centre lines of each row and column posts occuring during installationtwo direction's eastwest.

本文根据工厂设计与施工的实践经验，提出布机排列和设备安装施工中有关预留预埋工作中应注意问题与经验，包括：如何处理柱子与布机的关系，在设备安装中应如何处理由于施工误差引起的每排每列柱子中心线的误差，以及预留预埋工作中应注意问题。

Bearing are lubricated by clean 22 mechanical oil , bearing housing must be filled with lubricant to about 2mm over the central line of oil level gauge before pump operation.

泵轴承用洁净的22号机械油润滑，泵运转前须向悬架内加润滑油油标中心线以上2 mm 左右

The database consists of nodimensional data of load carring capacities, maximum pressures and their positions, flow factors, and power loss factors by solving full 2D Reynolds equation including oil feed features of 360°, 180°partial groove, and single oil hole, corresponding to a series of power law index, length/diameter, groove width/length, hole diameter/length, hole diameter/bearing diameter, eccentricity, angle between the attitude angle line and centre line of oil groove/hole, rotary, squezze, and oil feed pressure factors.

数据库中的数据通过求解全二维Reynolds方程和热平衡方程获得。数据库由对应于360°全油槽，180°半油槽和单孔的三类轴承的一系列的幂率指数，宽径比、槽宽／轴瓦宽、油孔直径／轴瓦宽、油孔直径／轴承直径、偏心率、偏位线与油槽中心线之间的夹角、挤压因子、旋转因子、进油压力因子的一系列的轴承无量纲的特性参数组成：油膜承载力、最大油膜压力及位置、流量系数和消耗功系数。

In a vessel of less than 20 meters in length the sidelights may be combined in one lantern carried on the fore and aft centerline of the vessel.

长度小于20米的船舶其舷灯可以合并成一盏装在首尾中心线上。

Before building oven bottom, wood screws shall be placed into center positions of horizontal target boards for marking centerlines of main walls and boundary lines of width shall be marked on all main walls.

砌筑炉底前，应在横列标板主墙中心位置上设中心线木螺丝，并划上各主墙的宽度边线。

Predictions of the centerline evolution scalars and the conditional statistics were compared with measurements and reasonable agreements were obtained.

对于中心线发展量与条件统计量的计算符合实验数据。

Using the jacket back pattern piece and a tracing wheel, measure down the center back line, 7.5cm (3 inches).

使用后身格裁片和擂盘，从后中心线向下量7.5cm。以下是复描样板原图的程序。

Using the jacket back pattern piece and a tracing wheel, measure down the center back line, 7.5cm (3 inches).

使用后身格裁片和擂盘，从后中心线向下量7.5cm。

As a downstream piping system when the valve opens, reflux valve, when closed, the main medium used to prevent backflow to prevent the pump and drive motor reversal, as well as a container medium discharge; currently the most commonly used is the valve flap around the body Swing Pin rotation flap valve and the valve body along the vertical axis to move lift check valve, but the above two kinds of structures exist in the valve closed, medium speed back quickly from the largest drop to zero, inlet side of the pipe resulted in the rapid pressure rise, resulting Proportional Pressure Reducing Valves in damaging effects on the piping system of water hammer phenomenon, it is generally a diameter of valve production of 50 ~ 500 mm.

止回阀作为管道系统顺流时开启，逆流时关闭的阀门，主要用于防止介质倒流，防止泵及驱动电机反转以及容器内介质泄放；目前使用最普遍的是阀瓣围绕阀体销轴旋转的旋启式止回阀和阀瓣沿着阀体垂直中心线移动的升降式止回阀，但以上2种结构的阀门均存在关闭时介质倒流速度从最大迅速降为零，致使管道进水管一侧内压迅速升高，从而产生对管路系统有破坏作用的水锤现象，所以一般止回阀生产口径为50～500 mm。

Tread: about the same car tire tread palanquins the distance between the center line.

轮距：同一车轿左右轮胎胎面中心线间的距离。

Breath, muscle contraction of the buttocks; arch body, as far as possible to hold his head, right leg straight towards the ceiling (peg-leg knee in order to avoid muscle tension).

呼气，收缩臀部肌肉；拱起身体，尽量抬起头来，右腿伸直朝向天花板（膝微屈，以避免肌肉紧张）。

The cost of moving grain food products was unchanged from May, but year over year are up 8%.

粮食产品的运输费用与5月份相比没有变化，但却比去年同期高8％。