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Pošta Srbije (Serbian Cyrillic: Пошта Србије, lit. 'Post of Serbia') is the national postal service of Serbia , with the headquarters in Belgrade . Public postal service was first introduced in Serbia in 1840.
[2] [3] Despite all the activities related to the construction of buildings intended for postal services, the Main Post Office Palace was not constructed until the beginning of the 1930s. An all-Yugoslav competition for the project of the "Palace of the Post Office Savings Bank and the Main Post Office and Telegraph" was announced in 1930.
Micro-abrasive blasting is dry abrasive blasting process that uses small nozzles (typically 0.25 mm to 1.5 mm diameter) to deliver a fine stream of abrasive accurately to a small part or a small area on a larger part. Generally the area to be blasted is from about 1 mm 2 to only a few cm 2 at most.
Copper slag is created during the copper smelting process. Around 4.5 million tons of copper slag is produced each year. Although copper slag is used in grit blasting and landfilling, only 15 to 20% of it is being used as of 2015. Since this is a heavily wasted material, finding ways to use it in different industries can reduce overall waste.
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Vacuum blasting is an abrasive blasting method, [1] also referred to as dustless blasting or closed loop abrasive blasting. [2] The method is characterized by a blast tool that does abrasive blasting and collects both used blast media, and loosened particles from the surface to be treated, simultaneously.
In 1990, 2.1 billion kg of commercial explosives were consumed in the United States (12 m 3 per capita), representing an estimated expenditure of 3.5 to 4 billion 1993 dollars on blasting. In this year the Soviet Union was the leader in total volume with 2.7 billion kg of explosives consumed (13 m 3 per capita), and Australia had the highest ...
Bristle blasting is a mechanical abrasion cleaning process that is performed on metallic surfaces by a brush-like rotary power tool. The tool consists of sharpened, high-carbon steel wire bristle tips that are designed with a forward-angle bend, i.e., the shank of the wire is bent in the direction of tool rotation.