◎ Reducing Joint
dn
D
D1
H1
400 × 315
400
315
620
400 × 250
250
626
315 × 250
562
315 × 225
225
577
250 × 225
512
250 × 200
200
514
225 × 200
495
225 × 160
160
496
200 × 160
490
200 × 110
110
160 × 110
455