air condition group
Thành Viên [LV 0]
co chuyen gia nao help me duoc khong, toi muon biet cong thuc hoa hoc cua loai dau boi tron may nen truc vit cua Chiller, loai dau tong hop, ho Ester. Toi rat can vi phai trinh hai quan va an ninh de gui di nuoc ngoai phan tich. Ai biet cong thuc hoa hoc thi xin chi bao gium nhe. Chan thanh cam on.