A Renaissance woodwind with a double reed and a curving tube ( crooked horn). Examples: The woodwind section complements the strings in this piece of music. 文艺复兴时期的带有双簧片和弯管的木管乐器。木管乐器的乐章弥补了这首曲子中弦乐部分的不足。
The structure of the existing open circuit warner is that: the reed switch and the open circuit warning circuit are connected into a section; 现有开路报警器构造是:干簧管与开路报警电路连接为一分体;