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【多选题】
189防止催化剂结焦的方法主要有( )。A.
设备的改进
B.
使用性能优良的阻垢剂
C.
选择合适的反应温度
D.
降低反应压力
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举一反三
【单选题】When a wire feeder is used, what is the welding gun connected to?
A.
Wire feeder
B.
Welding machine
C.
C
D.
D
【单选题】A wire feeder feeds the wire_____.
A.
automatically and continuously
B.
manually and continuously
C.
manually
D.
temporarily
【简答题】When a wire feeder is used, is the welding gun connected to the welding machine or the wire feeder?
【简答题】So the welding gun is connected to the wire feeder, and the wire feeder to the welding machine.
【简答题】Where is the wire feeder in a welding circuit?
【简答题】Does a wire feeder feed the wire automatically and continuously?
【单选题】The wire ____ automatically and continuously by a wire feeder.
A.
feeds
B.
is fed
C.
C
D.
D
相关题目：
【简答题】So the welding gun is connected to the wire feeder, and the wire feeder to the welding machine.