national standard system
National Television System Committee
National Television System Committee NTSC
NTSC National Television Standard Code
NTSC National Television System Committee
NTSC， National Television Standard Committee
National Television Standard Committee
Digital Television System
interactive digital television system
American National Standard
American National Standard Institute
American national standard labels
ammonia emission up to the national standard
ANSI， American National Standard Institute
biological National Standard Reference material
China National Digital Seismic Networks
China National Digital Seismograph Network
Chinese National standard
中国国标
茧干燥机
中国国家标准
中国农业工程学会
国家标准
Chinese National Standard CNS