- Coverer: Seamless sheath of ether-based urethane resistant to cathodic, hydraulic and other environmental conditions.
包层：无缝铠装乙醚基氨基甲酸乙酯。耐阴极、液压和其它环境条件。 - c. Cover use of closed Coverer, good for resolving environmental outdoor operation under adverse conditions of the dust pollution problem.
五、油钢采用特种进口钢材，精密度高，推力强劲，伸缩自如。
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