Laterally extensible foot support for motor vehicles
作者： Lustig Jr Joseph , Martin Drobney
DOI:
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摘要:
google.com.na 参考文章(3)
James L Shuck, Automatic door mat for automobiles ,(1950)
George A Keenan, Scraper step plate ,(1927)
Eric C Wahlberg, Automobile door and window ,(1946)