WebInternal thread (or nut thread) is a term to describe all internal threads in ISO metric thread standards. Threads produced to ASME B1.13M standard are fully interchangeable with threads that are based on ISO 68-1 basic profile and ISO 965-1 tolerance practices. Selected Internal Thread Tolerance Classes: -No-allowance - tolerance class 6H. Web11 apr. 2024 · 第二片和后面的胶合边厚比需要控制一下,焦距如果是确定的可以给一个微小的变动范围(可接受的误差范围),畸变需要早点控制,后面控制的话可能直接跑死了,边缘视场的提升因为结构差不多稳定了,所以呢想要提升的话可以牺牲一部分中心视场的像质,最后优化到一个平衡状态,不过我觉得 ...
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