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Number of views:
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Long spiral drill pipe
Retail price
0.0
元
Market price
0.0
元
Number of views:
1000
Product serial number
ZG05
Category
PRODUCTS
Quantity
-
+
Stock:
0
Product description
Parameters
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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