90㎡烧结机单辊破和8000布袋除尘风机减速机输入联轴器均采用（）传动。
参考答案：液力偶合器
The fire was finally brought under control, but not______ heavy damage had been caused.
A．before
B．after
C．since
D．until
平静吸气末肺内存有（）
A.余气量
B.功能余气量
C.肺活量
D.肺活量+余气量
E.潮气量+功能余气量
