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简述粗纱加工化纤时的牵伸工艺和加捻卷绕工艺的特点。

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超声波局放检测时应避免（）等干扰源带来的影响。

A. 大型设备振动
B. 人员频繁走动
C. 电动马达
D. 照相机闪光灯

You are troubleshooting a problem with a Cisco 7920 wireless IP phone that is causing the phone to drop calls. The problem appears to be a roaming bandwidth issue. In order to verify what kind ofissue it is， you decide to increase the bandwidth reserved for roaming on the WLAN controller to themaximum. What level do you set the bandwidth to？（）

A. 5 percent
B. 15 percent
C. 25 percent
D. 35 percent

井斜方位角

IP地址的分配有哪些方法？