needle tip meaning in Chinese

喷针头
针叶尖端

Method for the test of sharpness and strength of needles tips
针尖锋利度和强度试验方法
The influence of needle tip changes on the diesel engine performance
喷油嘴针阀头形状变化对柴油机性能的影响
Turn the vertical driving cam to the position where throat plate surface 3 and needle tip 4 align with each other , and the first or the second tooth of the top end of feed dog 5 descends from the throat plate surface
让针尖4与针板上面3对齐，在送布牙5的前端1 2齿从针板上面下沉的位置，转动上下传送凸轮，进行固定。