I found it on Craigslist (listed for sale in the business equipmentcategory).
我在Craigslist（在商务器具类挂牌出售）发现过这种架子。
2
They belong to equipmentcategory 1d and are therefore approved for use in zone 20, the most demanding.
他们属于设备类维和，因此，用于20个区，最苛刻的批准。
3
The first category includes original equipment manufacturers, such as automakers, who buy gauges to put in their cars, and users, which are companies that purchase products for their own consumption.