机读格式显示(MARC)

• 000 00809nam a2200253 a 4500

• 001 0000334301

• 003 CAL

• 005 20200814101500.0

• 008 050814s xx a 000 0 eng d

• 040 __ |a SCU |c SCU

• 090 __ |a TN92/I61/3

• 093 __ |a TN92 |2 5

• 096 __ |a G11 |2 SCUL

• 099 __ |a CALB0220110250300m

• 245 10 |a International Telegraph and Telephone Consultative Committee : |b Red book / |c C. C. I. T. T.

• 260 __ |a March : |b International Telecommunication Union, |c 1960.

• 300 __ |a v. : |b ill. ; |c 26 cm.

• 500 __ |a v. III. Line transmission and protection.

• 500 __ |a v. VII. Telegraph technique and data transmission.

• 500 __ |a v. IV. Maintenance.

• 500 __ |a v. VI. Telephone signalling and switching.

• 500 __ |a library has: v. 3, 4, 6, 7.

• 920 __ |a 251010 |z 2

• 998 __ |a SCU