$13.$ Stabilization processes in crude oil refining are designed to reduce the presence of $\_\_\_\_$ gases, thereby lowering the $\_\_\_\_$ and enhancing safety during $\_\_\_\_.$

$14.$ The main purpose of fractional distillation in a refinery is to separate crude oil into different $\_\_\_\_,$ each with a specific $\_\_\_\_$ point range, to produce products like $\_\_\_\_$ and $\_\_\_\_.$

$15.$ ASTM, TBP$,$ and EFV distillation techniques are employed to gather comprehensive data on crude oil's boiling behavior, crucial for $\_\_\_\_$ planning, $\_\_\_\_$ optimization, and $\_\_\_\_$ prediction.

$16.$ Atmospheric and vacuum distillation units are integral to refining operations, handling $\_\_\_\_$ and $\_\_\_\_$ fractions of crude oil, respectively, to maximize $\_\_\_\_$ recovery.