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https://t.cn/A6ANsVcX
用途
XL-21 、XRM101 系列配电箱，适用于户内三相五线制低压配电系统中，额定电压为交流220/ 380V、额定电流为16A~630A 及以下、额定频率50Hz，作为接受和分配电能使用。产品具有防漏电、防浪涌、过载、短路保护等功能。可应用于大户型住宅、别墅、写字楼等民用建筑，商场、酒店等商用设施以及工矿企业、体育场馆、医院、学校等公共场所。#配电箱# #电气#
D630
Scots scientist Mary Somerville is being celebrated with a Google Doodle on its UK homepage. The firm said it wanted to honour "one of the greatest intellectual writers of the 19th Century”.
The illustration of the Jedburgh-born mathematician and astronomer will appear on the page for 24 hours.
Google said her books were some of the most popular scientific publications of her time "opening the door for generations of female scientists".
Scots scientist Mary Somerville is being celebrated with a Google Doodle on its UK homepage. The firm said it wanted to honour "one of the greatest intellectual writers of the 19th Century”.
The illustration of the Jedburgh-born mathematician and astronomer will appear on the page for 24 hours.
Google said her books were some of the most popular scientific publications of her time "opening the door for generations of female scientists".
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