On November 18, the price for calcium carbide offered by Inner Mongolia Zhongliang Chemical Co., Ltd. is set at 2500 yuan/ton. The specification of calcium carbide includes: grade: First-grade; gas production (at 20℃ and 101.3 KPa) per liter per kilogram ≥: 280. The validity period of this offer is three days. The offeror is Wuhai Zhongliang Chemical Co., Ltd.