1 agriculture gardening sand sponge city urban planning Jerry Brown sets permanent water conservation rules for Californians Drought or no drought Read more
1 sand Precision Casting Coated sand as the raw material in the desert, processed into a new type of precision casting material coated sand, a green precision casting of key technology products, the upgrading of traditional casting materials to fill an international casting industry blank, won the Ministry of Electrical and Mechanical Science and Technology Progress Award, and in […] Read more