| 摘要 |
The portable demonstration board has two fixture brackets which serve for hanging and turning several sheets of paper. The brackets are anchored onto a horizontal support strut (14) to which is also fixed a stand for the board. The support strut is fixed to the back of the thin sheet of the board (10) a little way from the top edge (103). The support strut holds the shorter, rigid part of the fixture bracket which is divided into unequal halves. The other, longer part is movably fixed between the support strut and the top edge of the board's sheet. |
