以下为句子列表：
英文: 2 Counter balance system shall have a single weight, pulley, cable, counter balance system which prevents sash tilting and permits one finger operation at any point along full width pull.
中文: 平衡系统有砝码、滑轮、铰链等装置。平衡系统可以阻止移门倾斜，并且可用一只手操控。
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英文: The crampon can also be used for counter balance or by hooking with the heel behind icicles or in holes in the ice.
中文: 冰爪有时用来做反平衡或用脚后跟钩在冰柱上，或者放进冰上的小孔内。
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