Brand:Huajin
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Telescopic masts are composed of 3 sections to 6 sections ofdifferent square tubes. The materialis aluminium alloy and stainless steel for auxiliaryparts. The extending and retracting of the masts are driving bysteel wire inside of the tubes. it helps to run smoothly betweenand among each other from the top section tube to thebottom tube under bad conditions. 
