cathode opening contraction
...阴极断电收缩 anodal opening contraction; cathodal closing contraction; cathodal openign contraction; cathodal opening contraction; cathode opening contraction; kathodal opening contraction..
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cathode opening contraction
阴极开口收缩
以上为机器翻译结果，长、整句建议使用 人工翻译 。