Low speed wind tunnel experiment requires strict of the wind speed, which requires a wild range of wind speed, high precision, and quick adjustment.
低速风洞实验要求对实验段的风速有严格的控制，要求风速调节范围宽，精度指标高，调节速度快。
The variable speed systems now used in crank presses have problems such as narrow in variable speed, fault in low speed and failure in tiny adjustment and so on.
目前曲柄压力机调速系统存在调速范围窄、低速故障、微调死机等问题。
The variable speed systems now used in crank presses have problems such as narrow in variable speed, fault in low speed and failure in tiny adjustment and so on.
目前曲柄压力机调速系统存在调速范围窄、低速故障、微调死机等问题。
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