杆长(米) | 6 | 6.5 | 7 | 7.5 | 8 | 8.5 | 9 | 10 | 11 | 12及以上 | |
洞 深 (米) | 普通土 | 1.3 | 1.3 | 1.5 | 1.6 | 1.6 | 1.7 | 1.8 | 1.8 | 1.9 | 1.9以上 |
松土 | 1.4 | 1.4 | 1.6 | 1.7 | 1.7 | 1.8 | 1.9 | 1.9 | 2.0 | | |
硬土或 沙砾土 | 1.2 | 1.2 | 1.4 | 1.5 | 1.5 | 1.6 | 1.7 | 1.7 | 1.8 | 1.8 | |
坚石 | 0.9 | 0.9 | 1.0 | 1.0 | 1.1 | 1.1 | 1.2 | 1.2 | 1.3 | 1.3() |
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