• Ratio between room-temperature and 500° resistivities is 2.52 for silver, 2.71 for gold and 2.9 for copper.
• The ratio of height to diameter is extremely low.
• The measurement of ethane to ethylene ratio was required.
• Gas-oil ratio of 550:1 ...
• Steam-hydrocarbon feed weight ratio ...
• The plate thickness to hole diameter ratio ...
• They found the temperature-pressure relation ( ship ).
• Relation ( ship ) between counting efficiency and average energy ...
• Normally the densities of fresh water and salt water are in the ratio of 40:41.