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1. cement injector
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Cement gun, английский
A device for applying cement mortar as a spray; uses compressed air as the propellant.
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Abrasion hardness, английский
Hardness expressed in quantitative terms or numbers indicating the degree to which a substance resists being worn away by frictional contact with an abrasive material, such as silica or carborundum grits. also called abrasion resistance, wear resistance. compare scratch hardness.
Drag rake, английский
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