chal - circ
- chaldron
- chalk
- chalk black
- chalk up
- chalkstone
- chalky clay
- challenge
- chamber
- chamber blasting
- chamber charge
- chamber deposit
- chamber filter press
- chamber filter-press
- chamber membrane package of plates
- chamber mining
- chamber of ore
- chamber package of plates
- chamber-and-pillar
- chamber-and-pillar method
- chambered vein
- chambering
- chambering of the hole
- chamfer
- chamfered key
- chamfering bit
- chance cone agitator
- chance cone sand pump
- chance cone silt skimmer
- chaneller
- change
- change day
- change house
- change in gauge
- change of blade cutting angle
- change of measuring range
- change of rate
- change room
- change-over
- change-over switch
- changeable sectional lining
