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Long spiral drill pipe

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Number of views:
1000
Product serial number
ZG05
Category
PRODUCTS
Quantity
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Stock:
0
Product description
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产品简介:
    长螺旋钻杆可分为单壁空心钻杆和双壁钻杆,前者当钻至预定深度时,随钻具提出的同时连续灌入混凝土,再插入钢筋笼。后者可在钻进时一边钻进一边输入空气以减少回转阻力。
 

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