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一般井口滑轮为钢铁所制,十分笨重约达50公斤左右,在交通不便地区运输很不方便。我队采用了一种用本质制成的井口滑轮,不但减轻了重量(比原来之滑轮轻5倍),又节省了钢材约50公斤,且加工简单。其
General wellhead pulley made of steel, very heavy about 50 kg, transportation in the area of inconvenient transportation. Our team adopted a wellhead made of nature, which not only lightened the weight (5 times lighter than the original pulley) but also saved about 50 kg of steel and simplified the process. its