It is the key for propitiousness driving, designing thrust and torque, because the geology condition is complicated in Guangzhou.
广州地铁地质条件复杂，推力、扭矩大小的设计对能否顺利掘进很关键。
It is the key for propitiousness driving, designing thrust and torque, because the geology condition is complicated in Guangzhou.
广州地铁地质条件复杂，推力、扭矩大小的设计对能否顺利掘进很关键。
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