查询词典 pitch-black

NTN development went Dmn to be worth diameter of 〔 bearing pitch circle × rotate speed coming back is spent 〕 is 1.5 million, but the thrust needle bearing that high speed runs.

NTN开发出了dmn值〔轴承节圆直径×旋转速度〕为150万、可高速运转的推力滚针轴承。

The study on co-carbonization of coal tar pitch and lean coal with different blending ratios was conducted.

摘 要：进行了不同配比的煤沥青和贫煤的共炭化研究，研究表明，煤沥青与贫煤共炭化时的相互作用是物理融合和化学相互作用的共同作用。

Therefore, coal tar pitch modified with 4-MB was qualified to be an excellent carbon precursor.

因此，改性后的煤沥青有望作为优质的炭材料基体前驱体。

OBJECTIVE: To study the expressions of Nrf2 and NQO1 mRNA, Nrf2 protein by coal tar pitch extract.

目的： 研究煤焦沥青烟提取物对人肺支气管上皮细胞(BEAS-2B)Nrf2、NQO1 mRNA及Nrf2蛋白表达的影响。

The formulation,production process of epoxy coal tar pitch high build coatings and its application in corrosion protective projects have been describe

介绍了环氧煤沥青厚浆涂料的配方、工艺及其在防腐蚀工程中的应用。

The change in group component of the coal tar pitch road binder modified by tired rubber with reaction time and its modified mechanism were studied.

研究了煤沥青在供氢剂的作用下，族组成随反应时间的变化规律及其受氢改质机理。

To decrease the cost of C/C composites, the surfactants are used to improve the impregnation performance of coal tar pitch.

为降低C/C复合材料制造成本，采用表面活性剂对煤沥青进行改性。

Polarized microscope is employed to study the optical structure of pyrolyzed substrance of the modified coal tar pitch.

采用偏光显微镜研究DVB改性煤沥青的光学结构；采用 FT- IR和元素分析研究改性煤沥青的热解过程。

The production with plain carbon, can not combine the warm coal pitch in the pharmaceutical.

碳素的生产，离不开结合剂中温煤沥青。

Bulk graphite was prepared from starting materials of calcined coke and coal tar pitch by the hot pressing process.

以煅后石油焦和煤沥青为基本原料，采用热压工艺制备了一系列石墨材料。

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％。