参考文献

Phillips Petr.Co. Patent: US2464723 , 1944 ; Full Text Show Details Phillips Petr.Co. Patent: US2422859 , 1944 ; Full Text Show Details Phillips Petr.Co. Patent: US2447600 , 1944 ; Full Text Show Details Consort.elektrochem.Ind. Patent: FR884974 , 1943 ;