- accelerator rod
- access
- access gallery
- access tunnel
- accumulate
- accumulation funds
- acetylene cylinder
- acetylide copper
- acid cleaner
- acid test
- acidic
- accumulated discrepancy
- accumulation
- accumulation load
- accumulator
- accuracy test
- accurate location
- acetylene
- acetylene cutter
- achromatic
- acicular martensite
- acidimeter
- acidity
- acoustic test
- acre
- actability zone
- actinograph
- action turbine
- activation analysis
- activator
- active admixture
- active filer
- active storage
- actual cut
- actual density
- actual evaporation
- actual stress
- actuating cam
- actuator
- acidic rock
- ackerman steering
- acme thread
- acoustical ceiling
- across
- across cutter
- actiicing
- actual value
- actuating lever
- adaptation
- adaptor plate