例句與造句

1. The ELA gun utilized for Cromaclear has an exact beam / mask match ( an elliptical electron beam passes through an elliptical mask opening ) for optimum power transfer from electron beam to screen phosphors.
2. A laryngeal mask is composed of an airway tube that connects to an elliptical mask with a cuff which is inserted through the patient's mouth, down the airway to be managed by a health care provider.
3. It's difficult to find elliptical mask in a sentence. 用elliptical mask造句挺難的