seal together的用法和样例：
例句
- When required in the occupational setting, tight-fitting respirators cannot be used by people with facial hair that interferes with the face seal.
如果工作人员的面部有毛发，由于毛发会影响面罩与脸部的密合，这类人员就不能使用密合式呼吸器面罩了。 - Multiple sizes or alternative facepiece designs can provide the individual with additional options for obtaining a good fit and seal.
不同的号型或不同的面罩设计可以给使用者提供更多选择，取得良好的适合性和密合性。
