01062nam a2200217Ia 4500 CTU_142338 210402s9999 xx 000 0 und d 88000 621.382 B450 Bộ Bưu chính, Viễn thông Các tiêu chuẩn ngành Bộ Bưu chính, Viễn thông Hà Nội Bưu Điện 2006 Sách giới thiệu tiêu chuẩn: TCN 68 - 246: 2006, TCN 68 - 244: 2006, TCN 68 - 245: 2006, TCN 68 - 246: 2006, TCN 68 - 161: 2006, TCN 68 - 174: 2006 chống sét, tiếp đất và an toàn điện cho các thiết bị và công trình viễn thông. Electric engineering,Telecommunications,Viễn thông,Kỹ thuật điện Safety measures,Law and legistration,luật và các văn bản quy phạm pháp luật,Mức độ an toàn Trọng Hiếu Trung tâm Học liệu Trường Đại học Cần Thơ