The top covered raw material storage area is made by steel structure, and the semi-closed shed-structure building of plate is covered on the top, thus, effectively avoiding previous quality problem of raw material caused by sun burnt, rain and weathering, then guaranteeing the product quality from the source. At present, we have reserved about 1000m3 "Jinan black" dressed stone, and later, we will continue to purchase, to guarantee the demand quantity of customers require of "Jinan black".
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