共 7 条
[1]
Benson J. M., 1966, U.S. Patent, Patent No. [3,229,522, 3229522]
[2]
Benson J. M., 1965, U.S. Patent, Patent No. [3,181,357, 3181357]
[3]
LAUB JH, 1956, Patent No. 2729976
[4]
NORMAND CE, 1961, T 8 AVS VAC S, P534
[5]
STEVENSON DL, 1961, T AVS VAC S, P555
[6]
THOMAS CC, 1917, Patent No. 1222492
[7]
1968, J VAC SCI TECHNOL, V5, P92