01405nam a2200229Ia 4500 CTU_114167 210402s9999 xx 000 0 und d 32000 621.3824 B450/68 - 231 Bộ Bưu chính, viễn thông TCN 68-231:2005 Thiết bị vô tuyến lưu động mặt đất có ăng ten liền dùng cho truyền số liệu (và thoại) : Yêu cầu kỹ thuật Bộ Bưu chính, viễn thông Hà Nội Bưu điện 2005 Tiêu chuẩn ngành TCN 68 - 231: 2005 "Thiết bị vô tuyến lưu động mặt đất có ăng ten liền dùng cho truyền số liệu (và thoại) - yêu cầu kỹ thuật" được xây dựng dựa trên cơ sở chấp thuận nguyên vẹn tiêu chuẩn EN 300 390-1 V.1.2.1 (2000 - 09) và EN 300 390-2 V.1.1.1 (2000 - 09), có tham khảo thêm các tài liệu ETS 300-390 (1996 - 02), ETR 027, ETR 028 của viện tiêu chuẩn viễn thông châu âu, được trình bày dưới dạng song ngữ. Telecommunication systems,Telecommunication networks Antenna Năm Trung tâm Học liệu Trường Đại học Cần Thơ