ring replacement 中文意思是什麼
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In other words, replacement of the number 8 carbon by nitrogen in the purine ring does not eliminate activity.
換句話說,嘌呤環上第8位碳被氮所取代並不喪失活性。 -
Registered machine fits and positive sealing o - ring seals at all joints ; easy replacement
在所有連接點均配置擁有專利保護的機械式適合的、積極的o型密封墊圈,更換簡便易行。
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