control suction line

例句：

1. 1.The engineer controlled the suction line to ensure the cleanliness of the air.
   工程师控制了抽吸管，确保空气的清洁。
2. 2. The team used a control suction line to remove the dirt from the carpet.
   团队使用一个控制抽吸管来从地毯上清除污垢。
3. 3. The doctor controlled the suction line to prevent the patient from inhaling any foreign objects.
   医生控制了抽吸管以防止病人吸入任何异物。