How much does it cost to drill photovoltaic piles per meter? How much does it cost to drill photovoltaic holes? How much does it cost to drill photovoltaic holes?

Photovoltaic holes, how much does it cost to drill one meter, how much does it cost to drill photovoltaic holes, drilling photovoltaic holes, rotary coring drilling usually uses a traditional or wire rope type double or triple layer coring barrel equipped with a diamond or tungsten tip core drill bit ( A three-layer coring tube system can be constructed using a double-layer coring tube equipped with a semi-rigid plastic liner (simulated). The goal of core drilling is to obtain the best coring rate and core quality consistent with cost. (Rotary coring process) The traditional double-layer coring tube consists of two concentric cylinders. The outer barrel is rotated by the drill pipe and carries the core drill bit at its lower end. The inner cylinder is mounted on a swivel so that it does not rotate during re-drilling.
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