<https://cn.element14.com/harting/24-02-006-1110/fast-ethernet-switch-rj45-sc-6port/dp/2476201>
<http://www.w3.org/1999/02/22-rdf-syntax-ns#type>
<https://cn.element14.com/en-CN/harting/24-02-006-1110/fast-ethernet-switch-rj45-sc-6port/dp/2476201>