pgg p2gg 4 2 b 2 h,0;0,h. 2 a20,05%,. Origin at 2 给 cmm Co-ordinates of equivalent positions c2mm (0,0;1/2,1/2)+ O ① O ① 8 1 ;y;丽x ① 4 O e ① m 0,y;0, 4 d m 七，0；元，0. O① O① 4 c 2 4,4,4. ①O ① 2 b mm 0,. Origin at 2mm 2 a mm 0,0
pgg p2gg Origin at 2 , , 4 c 1 x,y; x,y; ½+x,½-y; ½-x,½+y. 2 b 2 ½,0; 0,½. 2 a 2 0,0; ½, ½. cmm c2mm Origin at 2mm , , , , , , , , , , Co-ordinates of equivalent positions (0,0; 1/2,1/2)+ 8 f 1 x,y; x,y; x,y; x,y. 4 e m 0,y; 0,y. 4 d m x,0; x,0. 4 c 2 ¼,¼; ¼,¾. 2 b mm 0,½. 2 a mm 0,0
p4 p4 p4m p4mm °6 O oo 610° o0 o 00 6。 609 Origin at 4 Origin at 4mm 8 8 1 X,;丙 4 d 1 xvi xy;y,;x. 防，历比 2 2 h,0;0,2. 4 f m ,x;;;飞， 1 b 4 么，. 4 e mx,2;元，h,h,x;h,元 1 4 0,0. 4 d mx,0;元，050，x0,元 2 c mm 2,0;0,h. 1 b4mm 么，么. 1 a 4mm 0,0
p4 p4 p4m p4mm Origin at 4 4 d 1 x,y; x,y; y,x; y,x. 2 c 2 ½,0; 0,½. 1 b 4 ½,½. 1 a 4 0,0. Origin at 4mm , , , , , , , , , , , , , , , , 8 g 1 x,y; x,y; y,x; y,x; x,y; x,y; y,x; y,x. 4 f m x,x; x,x; x,x; x,x. 4 e m x,½; x,½; ½,x; ½,x. 4 d m x,0; x,0; 0,x; 0,x. 2 c mm ½,0; 0,½. 1 b 4mm ½,½. 1 a 4mm 0,0
P4mm ⊙05± +● 005+ +(○ +⊙ @+ ○+ +O +6o b +05+ 6o9+ + + O+ +○￥
a c b P 4mm x y + + + , + , ++ , ++ , + + + , + , ++ , ++ , + + + , + , ++ , ++ , + + + , + , ++ , ++
p4g p4gm 0 水？ O ⊙ 0 0 0 Origin at 4 8 d 1 xvi y,;x,y;y,x; 丽：x+比，形；+y形+x 4 c m七，h+x;元，h-x;h+x,ch-七x 2 bmm2%,0;0,%. 2 a A 0,06,2. P4bm,PIus“+,andz
p4g p4gm Origin at 4 , , , , 8 d 1 x,y; y,x; ½-x,½+y; ½-y,½-x; x,y; y,x; ½+x,½-y; ½+y,½+x. 4 c m x,½+x; x,½-x; ½+x,x; ½-x,x. 2 b mm2 ½,0; 0,½. 2 a 4 0,0; ½,½. P4bm, Plus “+, and z” ?
p3 p3 Origin at 3 3 d 1 xyx-yJy-比， 1c3 23,13. 1 b 3 1/3,23. 1 a 3 0,0
p3 p3 Origin at 3 3 d 1 x,y; y,x-y; y-x,x. 1 c 3 2/3, 1/3. 1 b 3 1/3, 2/3. 1 a 3 0, 0