Tag Example

1. General series bolt type rectangular window (N)

General series (N), heavy-duty (E), nominal size 400 × 560mm, shoulder height 16mm, side hinge left inward opening (ILB), rectangular window N-E3 × 16-ILB-111 GB/T 5746-1996

2. Durable series bolt type rectangular window (P)

Fire resistant series (P), lightweight (F), nominal size 560 × 800mm, shoulder height 16mm, upper hinge inward upward opening (ITB), rectangular window P-F6 × 16-ITB-333 GB/T 5746-1996