And the impulse coupling coefficient is not sensitive to nozzle length and the distance between ignition zone and inner surface of nozzle.
而冲量耦合系数对点火区与聚光系统内表面的距离及喷管长度等参数并不十分敏感。
To avoid collision fingers and tools nozzle face, to prevent the nozzle surface damage or debris, such as obstruction of oil nozzle.
避免用手指和工具碰撞喷嘴面，以防止喷嘴面损伤或杂物、油质等阻塞喷嘴。
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