数控车床刀片或刀具()参数和切削参数要规范化、典型化。
A. 工作
B. 线性
C. 特性
D. 几何
The () compressor and its electrical motor are entirely housed in a gas-tight casing.
A. open-type
B. hermetic
C. A and B
D. None of the above
在正常情况及相同负载下,下列哪种类型的执行机构动作较慢()。
A. 液动;
B. 气动;
C. 电动;
D. 无法判断。
Outstanding salespeople like Mrs. Love () helped make our company a leader in this field.
A. has
B. have
C. is
D. are