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| 交错炮孔布置; 钻孔交错布置是一种炮孔布置形式，即奇偶各排。炮孔互相错开1/2孔距的布孔方式 | |||
| 交错布置; 梅花形模式; 梅花形布置 | |||
| staggered pattern: 7 phrases in 3 subjects |
| Explosives and Explosive Ordnance Disposal | 3 |
| Oil / petroleum | 1 |
| Technology | 3 |
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