you need to select total 4. first one E symbol good. next one U symbol good. next one staircase
page9-22.png page9-4.png page3-55.png page8-199.png
page3-54.png page3-55.png page1-36.png page9-4.png page6-113.png page1-167.png page9-22.png page5-72.png page1-149.png page8-199.png
page9-22.png page9-4.png
good. last one table with two leg