The difference between standard cabinets, server cabinets and wall ark?

Standard rack is 19 inch rack, 19 inch rack is refers to the net width to meet the national standards, some common network equipment are standard, such as to switches, servers are standard, these are generally used 19 inch rack, and we produce racks are placed these devices.
server rack is refers to the depth is deep, but no unified, some clients often ask us to 2 meters of the server cabinet, this is not definite answers, generally our server rack is 800 mm, 900 mm, 1000 mm deep rack belong to server rack. The server rack is not server cabinets are ordered much more deep.
wall ark is less than one meter. We will call his wall ark cabinet generally. Wall ark generally refers to the 6 u, u 9, 12 u three kinds of specifications of the most commonly used cabinet, wall cabinet is through expansion screws on the wall cabinets, the appearance of the wall cabinet height is divided into 320 mm, 450 mm, 590 mm, 770 mm, and the depth of the wall cabinet is 450 mm, the width is 19 inch standards.
wall ark also have a rack with castor, he is smaller than network and server rack cabinet, can be mobile, is for the convenience of the equipment put some small, light, his specifications for: 700 * 540 * 450 ( High deep mm wide) The size can also be customized according to customer's requirements.
the above can be compared to standard cabinets, server cabinets and wall ark what difference.
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