internal Q-switch

例句：

1. 1.The internal Q switch is responsible for the pulsed laser's ability to cut through different materials.
   内部Q开关负责脉冲激光切割不同材料的能力。
2. 2. This device uses an internal Q switch to produce a high-power, short-pulse laser beam.
   该设备使用内部Q开关产生高功率、短脉冲激光束。
3. 3. The engineer had to replace the internal Q switch due to its failure.
   工程师不得不更换内部Q开关，因为它已经失效了。