例句與造句

1. The laboratory offers calibration service for coaxial fixed and step attenuators . the frequency range covers 300 khz to 18 ghz and attenuation range of 0 to 70 db
   本所可為同軸的固定及階調(diào)衰減器提供校正服務。頻段由300khz至18ghz ；衰減幅度由0至70db 。
2. It's difficult to find step attenuator in a sentence. 用step attenuator造句挺難的