4. Internal-combustion engines
  5. Poppet valve operating mechanism
  6. With means for varying timing

Bong-Sang Lee

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Engine cooling system

Internal-combustion engines – Cooling – Automatic coolant flow control
Reexamination Certificate

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Oil supply structure for an engine cylinder head

Internal-combustion engines – Poppet valve operating mechanism – With means for varying timing
Reexamination Certificate

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