This standard specifies the classification, structure, specification series, markings, components and technical requirements for hand-cranked rectangular windows on inland river ships. This standard applies to parts of inland river vessels that do not require weathertightness or airtightness.
2004JT/T 247-2004 Hand-opened rectangular windows for inland-waterway vessels
JT/T 247-2004 Hand-opened rectangular windows for inland-waterway vessels has been changed from CB* 3332-1988 Hand-operated rectangular windows of inland ships.