flat-end造句

• Interior six - angled flat - ended fixing screw
  内六角端平紧定螺钉
• Flat - ended keys for deck screw caps for filling and sounding pipes
  填充和测深管用平头螺帽的平端键
• Square headed flat - ended fixing screw
  方头平端紧定螺钉
• Slotting flat - ended tightening screw
  开槽凹端紧定螺钉
• Testing of asphalt ; indentation testing using a flat - ended indentor pin
  沥青的试验.使用平端压头针的刻痕试验
• Under the condition of penetration by flat - ended projectiles , the noses of flat - ended projectiles keep integrity when the velocity is under the normal projectile velocity
  当弹速处于亚弹速范围时，弹头都保持了完好，此时弹体也视为刚性弹。
• When targets penetrated by flat - ended projectile , shear deformation along the penetration direction appears , at the same time compressive deformation also appears in the material that is in front of the projectile . the compressive deformation begins at the back surface of the target and spreads inward
  钝头弹侵彻下，侧壁材料发生轴向剪切变形，同时，弹体前方的材料发生压缩变形，压缩变形首先在靶板背表面开始，而后自背表面向靶内传播。
• Targets made of ship - building steel , which is concerned , were penetrated by conical and flat - ended projectiles . the damage and failure behaviors of targets have been studied systematically by micro - hardness , metallography and scanning electron micrography . the results show that the ductile hole failures and back - surface petal failures are achieved when targets penetrated by the conical projectiles
  本文以某船用钢为研究对象，运用弹板侵彻试验及显微硬度、金相显微镜和sem等分析测试手段，研究了靶材在侵彻过程的物理变化和损伤规律，从而对尖头弹和钝头弹侵彻船体钢的物理过程有了较全面的了解。
• According to the land forces criteria ( u . s ) for ballistic limit and by using the method that the ballistic limit is equal to the average of two velocities that are partly penetration velocity and completely penetration velocity respectively , the ballistic limit is determined targets penetrated by both conical and flat - ended projectile , the result can be in the table
  结果表明，不论是尖头弹侵彻还是钝头弹侵彻，这两个板厚的船体钢的弹道极限均未超过常规弹速范围，一般的枪炮可轻易达到这一范围，因此从这个意义上说，这两个板厚的船体钢的抗侵能力不是很理想。