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