Packed extration column
[化] 填充式萃取塔
🧩 词语组成解析
packed
[pækt]
adj. 充满…的;塞满了…的;
v. 包装(pack的过去式和过去分词);
column
['kɑləm]
n. 纵队，列;圆柱;专栏;
🗣️ 情景例句
Room service. May I help you?
客房服务部，需要我为您效劳吗？
How many pounds are you going to order?
你要订几磅？
2% for prompt payment, net in thirty days.
立即付款的话可以有九八扣，三十天内付款需付全额。