headpiece

It is an important behavior in order to obtaining super-performance of diesel engine with the selecting and using of piston material, assignment of the compression-height and the field of fire, improvement in the form of piston headpiece, piston rings match and etc.

通过BH160F小型柴油机活塞材料的选用及对压缩高度、火力岸布置、活塞顶部形状和活塞环匹配等方面进行改进设计，使柴油机获得了良好性能指标。

He was staring at the headpiece of my tefillin. I reached up and took off what had to be the most sickening tefillin headpiece anyone has ever seen.

见他目不转睛地盯着塔夫林上的头巾，我赶紧伸出手，拿走了这个人们所见过的最让人作呕的东西。

Optical components with complex surfaces or microstructures are more and more widely used in martial and civil fields. For example, micro-lens array in infrared detector and freeform prism in military headpiece can greatly improve integrative performances of optical system.

近年来，复杂面形或微结构光学元件在军事和民用领域的应用越来越广泛，例如红外探测器中的微透镜阵列、军用头盔中自由面形棱镜，均能够大大提高光学系统的综合性能。