Loading data. Please wait
Style of technical standard
Số trang:
Ngày phát hành: 1992-04-01
Standard of interphone for welfare use
Standard of interphones used as information system in daily life
Self-control of indicators for outside door
Ngày phát hành: 1991-04-01
Số trang: 73
Ngày phát hành: 1996-09-01
Method to test FM loading interphone performance
Technical standard on works on interphones for social welfare purposes
Standard to calculate the life of manganese dry batteries used for battery-operated interphones
Self-control of indicators for outside door (documented details)
