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| Shandong Langcheng Chemical Co., Ltd. | China national standards | MT | 1057.93 | USD | 20250805 | 
| Shandong Langcheng Chemical Co., Ltd. | China national standards | MT | 1057.5 | USD | 20250804 | 
| Shandong Langcheng Chemical Co., Ltd. | China national standards | MT | 966.45 | USD | 20250804 | 
| Shandong Langcheng Chemical Co., Ltd. | China national standards | MT | 965.09 | USD | 20250801 | 
| Shandong Langcheng Chemical Co., Ltd. | China national standards | MT | 1056.0 | USD | 20250801 | 
| Shandong Langcheng Chemical Co., Ltd. | China national standards | MT | 1056.03 | USD | 20250731 | 
| Shandong Langcheng Chemical Co., Ltd. | China national standards | MT | 965.12 | USD | 20250731 | 
| Shandong Langcheng Chemical Co., Ltd. | China national standards | MT | 965.83 | USD | 20250730 | 
| Shandong Langcheng Chemical Co., Ltd. | China national standards | MT | 1056.82 | USD | 20250730 | 
| Shandong Langcheng Chemical Co., Ltd. | China national standards | MT | 1055.78 | USD | 20250729 |