On this basis the cracked position and inclination of the main roof are determined. The Influence of the Fracture of the Main Roof On the Mining Ground Pressure

The effect of the cracked position and the shape of the crack on scattering pressure are considered.

考察了裂纹的位置以及形状等因素对散射声压影响。

The Numerical Analysis of the Cracked Position and Inclination of the Main Roof

老顶断裂位置及断裂后回转角的数值分析

It reviewed the latest research development of technology using waster plastics and cracked catalyst producing fuel oil and pointed out the development trend of this technology.

分析了国内外废塑料油化技术及其裂解催化剂的研究进展，并指出未来废塑料油化技术的发展方向。

Research Development of Technology Using Waste Plastics and Cracked Catalyst Producing Fuel Oil

废塑料油化技术及其裂解催化剂的研究进展

The content of non-basic nitrogen compound, is 3-5 times more than that of basic nitrogen-compound and the percentage of distribution of nitrogen-compounds in the four types of catalytically cracked diesel fuel are about the same.

中性氮化物约为碱性氮化物的3～5倍。四种催化柴油中各氮化物类型占总氮的相对百分数基本上在同一水平。

Study of the NITROGEN-COMPOUND distribution in catalytically cracked diesel fuel and its hydrogenated oil by gas chroma& tography/ microcoulombmetry

气相色谱/微库仑法研究催化柴油及其加氢生成油中氮化物类型和分布

Study on color stability of catalytic cracked diesel fuel

催化柴油色度安定性研究

Unsaturated polyester resin ( UPR) wastes pyrolysis was cracked to prepare feed stock, and process conditions of catalytic cracking reaction were introduced systematically.

对不饱和聚酯树脂（UPR）废料裂解制原料油技术进行了研究，系统地考察了催化裂解反应工艺条件。

It also gives a detailed analysis of properties of various kinds of stock and cracking yield status, which has strong reference significance to increase the source of cracked stock in similar units.

详细分析了各种原料的性质和裂解收率情况，对于同类装置增加裂解原料来源具有较好的借鉴意义。

State of Separation of Cracked C5 Residue Abroad

国外裂解碳五馏分的分离状况

This paper systematically introduced separation technology of cracked C5 residue abroad.

介绍了国外裂解碳五馏分的分离技术。

For the same catalyst, basic nitrogen and total nitrogen content in gasoline and diesel oil have maximum values with catalyst content increasing but in cracked residue the two nitrogen contents decrease.

对于同一催化剂，随催化剂含量的增加，汽油馏分和柴油馏分中的碱性氮和总氮含量先增加后降低，而尾油中的碱性氮和总氮含量逐渐降低；

In vacuum gas oil and cracked residue, the mass ratio of basic nitrogen to total nitrogen is 0.300-0.390.

蜡油馏分及尾油中的碱性氮与总氮的质量比约为0.300-0.390，且不随催化剂含量的改变而改变。

Study of steam cracked residue as motor fuel oil

蒸汽裂解渣油用作发动机燃料油的研究

In order to ensure solid motor with cracked grain to be successfully launched, the strain and stress concentration at the tips of crack should be released by shoveling slot on the crack of grain surface.

工程实际中通常采用于药柱表面裂纹处铲槽的方法来释放裂纹尖端的应力应变集中，以确保药柱含裂纹的固体发动机能正常点火发射。

Mengsi Effective cracked grain heart with the operating not hand master unity, uncoordinated and not smooth, asymmetry problem.

有效破解纹饰师心手配合操作不统一、不协调、不流畅、不对称的难题。

A Preliminary Study on the Heat Flux in the Cracked Sea Ice Region of the Arctic Ocean During the Melting Season

融冰季节北极破碎冰区热通量的初步研究

The weight of all that water cracked the ice beneath

这些水的重量把下面的冰都压碎了

Swing ingredients in a shaker with cracked ice, strain into a chilled cocktail glass, and garnish with a slice of lemon.

将液体注入混合器，加碎冰块摇匀，注入冷却过的鸡尾酒酒杯，用一片柠檬装饰。

Although the late sowing could somewhat reduce the incidence of cracked stem disease, but it could not show high yield and high quality of broccoli.

虽然在田间试验中适当推迟播种日期可以在一定程度上降低裂茎病发生率，但是这样并不能保证青花菜的产量和商品品质。