参考文献
Shell Devel.Co.
Patent: US2449347 , 1944 ;
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Shell Devel.Co.
Patent: US2395523 , 1943 ;
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Shell Devel.Co.
Patent: US2403771 , 1943 ;
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Bell et al.
Industrial and Engineering Chemistry, 1949 , vol. 41, p. 2603