Porthole Aluminium Tipe BoltedDeskripsi produk:1. Standar: GB/T14413-932. Bahan: aluminium3. Kanthi/tanpa lampu mati, kedap banyu lan gastight4. Opening: tetep bolted5. Digunakake kanggo kapal laut lan kapal perang uga bisa digunakake kanggo kapal darat6. Jinis utama: jinis medium lan jinis cahya7. Sertifikat CCS, ABS, BV, DNV kasedhiya