共 127 条
[41]
GOTTSCHALK H, 1971, Patent No. 2158463
[43]
Green B., 1957, US Pat, Patent No. [2,800,457, 2800457]
[44]
Green B. K., 1957, US, Patent No. [US 2800458 A, 2800458, 2800458A]
[45]
GREEN BK, 1953, Patent No. 199206
[46]
Gutcho M.H, 1972, CAPSULE TECHNOLOGY M
[47]
Hansen LI, 1965, US Patent, Patent No. [3,223,518, 3223518]
[48]
HANSEN LI, 1959, Patent No. 1254162
[49]
HARBORT L, 1966, Patent No. 3293060
[50]
HARBORT L, 1966, Patent No. 1519930