Zhenhua Crystal adhering "to the letter first, to the customers to integrity, quality and service for the purpose," to create a win-win situation with you to meet a better tomorrow.
振华水晶秉承“以信为先，对客户以诚信、质量、服务为宗旨”，与您共创双赢，迎接美好明天。
The rate equations for a continuous four level laser are solved in this letter, taking into account the finite lower level lifetime and the crystal field splitting of the laser levels.
在考虑了有限的下能级寿命和激光能级与晶格场的相互作用的基础上，对四能级激光的速率方程组进行了求解。
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