Double sightglass lubricator for compound steam engines (New Catechism of the Steam Engine, 1904).jpg
en
Double sightglass lubricator for compound steam engines (New Catechism of the Steam Engine, 1904), Displacement lubricators, New Catechism of the Steam Engine (1904)/undescribed
commons
en
Double sightglass lubricator for compound steam engines (New Catechism of the Steam Engine, 1904), Displacement lubricator for adding oil to a steam supply
commons
ja
複式複眼鏡用潤滑装置
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ja
複式複眼鏡式蒸気機関用潤滑装置
commons_translated
catechism catechismal displacement steam-powered steam engine water vapor