Board for study observation

摘要

Topic The grid line and correspondence accessing the side arm division section which is attached, it offers the board for study observation which can draw the picture easily making use of the grid line.Solutions In the long side destal of plate 11 when it has graduation line and possess the numerical value of the division side arm division section 14a and 14b which in grid line section 13 correspondence are attached, places the form of A4 size in depth on the median of the plate and locks in clip section 12, outside the long side in the form of A4, it is the board for study observation which becomes a state where side arm division section 14a and 14b are visible. Choice figure Drawing 1