Chair and lab stool design should be adjustable, chairs should have a stable base, arms of chair shall be adjustable in height and weight.
椅子和凳子的设计应可调节。椅子应有稳定的基座，椅子扶手可按高度和重量调节。
Chair and lab stool design should be adjustable, chairs should have a stable base, arms of chair shall be adjustable in height and weight.
椅子和凳子的设计应可调节。椅子应有稳定的基座，椅子扶手可按高度和重量调节。
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