English translation for "原频率标准"

primary frequency standard

Similar Words：

"原片，底片原像" English translation, "原片层体" English translation, "原片黑度" English translation, "原片属" English translation, "原片亚科" English translation, "原平" English translation, "原平产业公司" English translation, "原平里" English translation, "原坡高" English translation, "原普华永道" English translation