To achieve the above object, {HEAD ~ the present invention} provides an oil filling device, which comprises an oil filling funnel, an extendable tube assembly, a direction adjustment assembly, and {TAIL ~ a coupling assembly} 
To achieve the above object , { HEAD ~ the present invention } provides an oil filling device , which comprises an oil filling funnel , an extendable tube assembly , a direction adjustment assembly , and { TAIL ~ a coupling assembly }
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