How to remove the center part of PS
generally, the drawing part is divided into three parts to calculate the area respectively. That is, the area of the straight cylinder + the area of the fillet at the bottom + the area of the circle at the bottom
area of straight cylinder A1 = D (H-R) π
bottom fillet area A2 = [2] π ﹙d－2r﹚＋8r²] π／ 4
area of bottom circle A3 = (d-2r) & # (178); π／ 4
∑A＝A1＋A2＋A3
D0＝√A1＋A2＋A3 ／ π< br />D0＝√4﹛d﹙H－r﹚ π＋[ two π r﹙d－2r﹚＋8r²] π／ 4＋﹙d－2r﹚² π／ 4／ π< br />D0＝√﹙d－2r﹚²＋ two π r﹙d－2r﹚＋8r²＋ 4d﹙H－r﹚
Take Beijing traffic card as an example:
1. Address of Xidan customer service center in Xicheng District: West Gate of No.45 fuxingmennei street, Xicheng District, business hours: 8:30-19:00
the address of Lingjing Hutong of line 2 and line 4 is in the middle of the station hall, and the business hours are the same as the subway operation hours
the inner address of Guang'an gate of line 3 and line 7: East Hall (entrance B / C) and entrance a of West Hall, and the business hours are the same as those of Metro
The address of pinganli of line 4 and line 6 is East Hall (entrance g / F) and middle hall (entrance h), and the business hours are the same as those of Metroaddress of Chegongzhuang West of line 5 and 6: East Hall (entrance B and entrance C), West Hall (entrance a), business hours: the same as metro operation hours
Ximen address of line 6 and line 2: entrance / exit a and D, business hours: the same as metro operation hours
7. Address of tram Exhibition Road: at the gate of No.32 Fuwai Street, business hours: 7:00-19:00
8. Address: Fuchengmen bus station, business hours: 7:00-19:00
Xidan business hall 2 address: West Gate of yard 45, fuxingmennei street, Xicheng District, Beijing, business hours: 8:30-19:00 Xidan business hall 1 address: West Gate of yard 45, fuxingmennei street, Xicheng District, Beijing, business hours: 8:30-19:00 the above contents refer to: Beijing municipal transportation card service outlets