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GB/T 23561.11-2024_Chinese: Methods for determining the physical and mechanical properties of coal and rock - Part 11: Methods for determining shear strength of coal and rock (Chinese: 煤和岩石物理力学性质测定方法 第11部分：煤和岩石抗剪强度测定方法) Note/Careful: Text of PDF is in Chinese (not English). Delivery (PDF in Chinese): 2 working-hours typically, ASAP English versions: GB/T 23561.11-2024
