Morning of November 1, Tajikistan merchant and his entourage visited Shandong China Coal Group for inspection on the purchament of shotcrete machine and a series of mining equipment, to discuss long-t
Shotcrete Machine(dry-mix shotcrete) was commercially developed after the World War II but was not in general use until the 1970s. The concrete mix is supplied in the wet form and is pumped to the spr
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Executive Editor:Zhang Wen