查询词典 pitch-black

The pitch diameterof a gearis defined as the diameter of the pitch circle of that gear.

齿轮的节圆直径定义为齿轮的节圆的直径。

Pitch Diameter is the diameter of the pitch circle.

节圆直径：节圆直径是节圆所在圆的直径。

Requirements: Calculate dimensions and parameters like screw pitch, diameter of gear pitch circle etc.

实验要求：根据给定的轴、齿轮、螺纹进行测绘，运用已学过的基本知识，计算出有关尺寸，如螺距、齿轮的有关参数等。

Calculate dimensions and parameters like screw pitch , diameter of gear pitch circle etc. by given casting parts.

根据给定的铸造零件进行测绘，运用已学过的基本知识，计算出有关尺寸，如螺距、孔中心距等的有关参数等。

Practice:: measure The thickness of a tooth measured along the pitch circle is one half the circular pitch.

沿节圆所测得的齿厚是周节的一半。

As the number of impressions increase, however,the pitch circle diameter design becomes progressively more impracticable as the runner length, which is a function of the pitch circle diameter, is also increased.

可是随着型腔数目的增加，由于流道长度是等分圆直径的函数，所以设计的流道长度随着等分圆直径的增加变得不现实。

These gears are manufactured with widths of their teeth (as measured along the pitch circle) such that when two such gears are installed with a center distance consistent with their standard pitch diameters, the teeth of the two gears will mesh "well".

生产齿轮的时候要根据齿的宽度，这样当两个齿轮装配成中心距离与分度圆直径相吻合的时候，两个齿轮的齿就可以正确啮合。

The coal pitch spheres were produced from the coal pitch by suspension method.

以煤沥青为主要原料采用水浴悬浮法制备沥青球。

Coal tar pitch and petroleum pitch were prepared from petroleum residues and coal tar by air blowing respectively.

分别以煤焦油为原料在300℃空气氧化120min～480min和以石油渣油为原料在220℃空气氧化300 min～720 min，制备了一系列具有相近软化点的煤焦油沥青和石油沥青。

Coal tar pitch and petroleum pitch were prepared from petroleum residues and coal tar by thermal reactions respectively.

分别以煤焦油为原料，在430℃热缩聚50min～270min和以石油渣油为原料在 310℃热缩聚130 min～370 min，制备了一系列具有相近软化点的煤焦油沥青和石油沥青。

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％。