... diagonal judgment system 对角线裁判制 diagonal ventilation system 对角式通风系统 two-way diagonal ventilation system 两翼对角式通风 ...
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two-way diagonal ventilation system 两翼对角式通风
one-winged diagonal system of ventilation 单翼对角式通风系统
two-winged diagonal system of ventilation 两翼对角式通风系统
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