CN113167172A CN201980064973.2A CN201980064973A CN113167172A CN 113167172 A CN113167172 A CN 113167172A CN 201980064973 A CN201980064973 A CN 201980064973A CN 113167172 A CN113167172 A CN 113167172A Authority CN China Prior art keywords rotor internal combustion combustion engine drum rotary internal Prior art date Legal status (The legal …
US6152718A US09/004,059 US405998A US6152718A US 6152718 A US6152718 A US 6152718A US 405998 A US405998 A US 405998A US 6152718 A US6152718 A US 6152718A Authority US United States Prior art keywords rotor small positive bent radius Prior art date Legal status (The legal status is an assumption and is not a legal conclusion.