中继

C1

C2

C3

C4

C5

C6

R1

P1

P2

P3♁P4

P4♁P5

P5♁P6

P6♁P1

R2

P4

P5

P6♁P7

P7♁P8

P8♁P9

P9♁P4

R3

P7

P8

P9♁P10

P10♁P11

P11♁P12

P12♁P7

R4

P10

P11

P12♁P1

P1♁P2

P2♁P3

P3♁P10