| 摘要 |
A hand pump comprises a cylinder head and a pressure gauge. The cylinder head comprises an air passage for inflating an object to be inflated. The cylinder head further comprises a receptacle communicated with the air passage. The pressure gauge is detachably engaged with the receptacle of the cylinder head. Alternatively, the pressure gauge is pivotally engaged with the receptacle of the cylinder head. A coupler may be engaged with the pressure gauge for engaging with a tire valve.
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