reaction couple - reinforcement cross section
- rectangular stress diagram
- rectangular system of street layout
- rectangular timber
- rectangular weir
- rectangular wire
- rectangularity
- rectibolic formula
- rectification
- rectification column
- rectifier
- rectify
- rectifying camera
- rectifying printer
- rectilineal
- rectilinear
- rectilinear building
- rectilinear structure
- rectilinear translation
- recumbent
- recuperated work
- recuperation
- recuperative heat exchange
- recuperator
- recurrence
- recurrence formula
- recurrence interval
- recycle
- recycle of sludge
- recycle sludge
- recycled
- recycled concrete
- recycled from left-over concrete aggregate
- recycled material
- recycled water
- recycling
- recycling of returned concrete
- recycling of sewage
- recycling of sewage water
- recycling of wastes
- recycling pumping station