立柱配有自润滑系统，不需人工加油，提高了机器的使用寿命。
Thee pilar equipped with self-lubricating system doesnneed any hand lubrication, the machine usage life hence is improved.
立柱配有自润滑系统，不需人工加油，提高了机器的使用寿命。
Thee pilar equipped with self-lubricating system doesnneed any hand lubrication, the machine usage life hence is improved.
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