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1. Safety and environmental protection: Heavy metals are "not detected" and have extremely low radioactivity, far exceeding the national standard.
2. High-quality and stability: high-purity and high-white gypsum are used and calcined at low temperature through two-step method.
3. Very high purity: the content of key harmful substances (phosphorus, fluorine) is only 1/10 to 1/5 of the national standard.