共 27 条
[1]
BACKMAN N, P 24TH ANN INT TEL E, P107
[2]
Baker R. H., 1981, U.S. Patent, Patent No. 4270163
[8]
KARUTZ P, 2007, P 22 APPL POW EL C A, P816
[10]
KOLAR JW, 1999, P INT TEL EN C COP D, P16