The effect of controlholes of the blasting method was analyzed theoretically and the blasting mechanism of it was discussed and tested by lab and in field.
在理论上和利用实验室模型实验对深孔控制卸压爆破中的控制孔的作用进行了研究分析。
2
Jacquard’s loom was the first to use pasteboard cards with holes punched in them to control the operation of a loom.
雅卡织布机是第一台用带孔厚纸片来控制的织布机。
3
"Goal is for attacker to gain control," the July paper said in describing the many kinds of maneuvers that could exploit system holes.