Tianzheng 8.5 stairs no section line
First to say the simplest no cut, that is, only the tread, no picture cut off the line;
the next section is the second half of the stairs to cut off the upper half of the cut, and on the contrary, cut off the second half , To retain the upper half of the staircase;
double section is to use the two sections of the symbols are used, the stairs tread looks complete, but in fact the following half of the stairs and connected to the layer of that half of the stairs is not The same staircase.
