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- head, friction
- headfuck
- headful
- headful mechanism
- headfuls
- head gap
- head gardener
- head gargle
- head-gargle
- headgargle
- head gate
- headgate
- headgate grass
- headgate of lateral
- headgate of lateral, culvert type
- headgate of lateral, division
- headgate of lateral, open channel type
- headgate of lateral, wooden box
- headgate, overpour type
- headgate, panel wall of
- head gates
- headgate, side wall of
- headgates of laterals
- headgates of laterals, bifurcation
- headgate, undershot type
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