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person:("zhao zhiyong")
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person:("zhao shilong")
Rail guide device of highway-railway dual-purpose vehicle
Highway and railway dual-purpose high-altitude maintenance operation vehicle
A study of a high-power, ammonium chloride zinc-manganese dioxide dry battery
Auxiliary mounting and positioning tool for assembled wall cupboard
Agricultural machine vehicle body suitable for hilly and mountainous areas
Power bogie of suspension type monorail engineering van