请用英语介绍家乡，我是山西的，

山西位于太行山之西，黄河以东。春秋时期，大部分地区为晋国所有，所以简称“晋”；山西的土特产品种类繁多。杏 花村汾酒是我国古老的历史名酒，色如水晶美玉，清香纯正，味美无穷，畅销内外；山西老陈醋甜绵酸香，不仅调味上佳，还可消食、美容、杀菌；有国家重点风景名胜区五台山、恒山、黄河壶口瀑布、北武当山、五老峰等。欢迎大家来山西旅游观光。我为我是山西人而感到骄傲！

英文翻译：

Shanxi is located west of the Taihang Mountains, east of the Yellow River. Spring and Autumn Period, most of all for Jin, therefore referred to as "Jin"; Shanxi, a wide range of native products. Xinghuacun fen ancient history of our wines, the color of Crystal Jade, fragrance pure, delicious infinite, best-selling domestic and foreign; Shanxi mature vinegar sour sweet and fragrant cotton is not only a good flavor, but also digestion, beauty and sterilization; a national key scenic spots Wutai, Hengshan, the Yellow River Hukou Waterfall, North Wudang, Wu Laofeng so. Welcome to Shanxi tourism. I am proud that I was from Shanxi!

希望你能满意！

进口医疗器械上的“REF”、“LOT”、“SN”分别是代表什么？生产批号？货号？

REF：Reference 参考号，可以是商品号或合同号

LOT：生产批号

SN：Serial Number 产品序列号 也就是货号