No.785, no.4, west port avenue, west port economic development zone, shuangliu district, chengdu city
What is the shelves of the main frame and the sub frame?
Disassembled storage shelves, two shelves connected to use the middle can share a column.
Assuming that the first shelf is called the main frame, then less one column is the secondary frame. A row of shelves and many groups of shelves linked together, then there is a main frame, the rest are sub-frame.