Monotron
莫诺速调管, 直越式速调管, 无反射极速调管
🗣️ 情景例句
Hi.
你好！
Our packing charge includes $1 for the drum, which sum will be credited on return.
包装费中有1美元是包装桶的费用，此费用在桶还给我们时可退回。
They help their parents to open their stockings, too.
他们还帮助父母打开他们的袜子。