Speaking of 10 square sprinklers, it is really a very nerve-racking thing. Not to mention how many configurations can be selected for this tonnage, it is said that the brand is a troublesome thing. Although Sungzhou Chengli and Xigong Chu Sheng are all low-end, …
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Since the mining is from the top to the bottom, the upper steps are firstly mined to the realm, and some of the fixed slopes are formed, and it is required to remain stable for a long time without a large number of landslides. In operation, the smaller the final slope angle, the safer it is. Ho…
Analysis of quasi-secondary compression cycle characteristics of common refrigeration compressors in petrochemical equipment test Xu Shuxue, Ma Guoyuan, Peng Yu (Beijing University of Technology, Beijing 100124) The performance of the cycle. The gas-inductive characteristics and cycle per…
First, the basic knowledge
Divided into shallow hole step blasting and deep hole step blasting. Open-air shallow hole blasting refers to the step blasting operation where the diameter of the blasthole does not exceed 50 mm and the depth of the blasthole does not exceed 5 m. Bench bl…
1. What is the relationship between slurry concentration and flotation index?
A: The slurry concentration is one of the main factors affecting the flotation index. During the flotation process, the slurry concentration is very low and the recovery …
1. Purpose
In order to maintain a good order of production, improve labor productivity, so that employees maintain good physical fitness and a strong effort, trying to do their job, according to state regulations, combined with the actual situation
Friends must know the "Lamborghini" super run, but some people may not know that Lamborghini was originally a famous tractor manufacturer, and is still manufacturing tractors.
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(1) Principles for the arrangement of construction equipment in the well
The main construction equipment in the well during the construction of the shaft includes: buckets, rock grabs, drill stands, safety ladders, pumps, etc.
1. Arrangement of the bucket
The bucket …
Five years, hard work; five years, accumulate. The high-fidelity Chinese auto parts industry has met the arrival of the "Nineteenth National Congress" with practical achievements.
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As one of the world’s largest energy companies, Chevron’s recent “conditions†are quite numerous. What attracts most attention is Chevron's transfer of some of its assets in South Africa and Mumbai to two Chinese companies, and the other is a tax dispute of …