Special tapered shape, makes sure that fillings can open easily or properly shrink to suiting different caliber.
独有的外动凹槽形状，确保充填物容易打开或适当缩小以适应不同口径的缺损。
2
A novel laser screen method with retroreflector for velocity measurement is introduced for some special velocity measuring occasions like wide spreading range or large caliber projectiles.
为满足弹道散布范围大或大口径弹丸的测速场合，提出了一种原向反射式激光光幕测速的方法。
3
Large caliber cementing is a special operation in offshore drilling engineering.