（4）最后一步，也是前面提到过的金属条问题，将口罩佩戴完毕后，需要用双

(4) The last step is the aforementioned problem through the metal strip, after wearing the mask is completed, the pressing need to use both hands on both sides of the metal strip of nose, upper end against the nose mask, face mask and then drawing down the masks do not leave the fold, it is best to cover the nose and mouth.

(4) The last step, is also mentioned above the metal bar problem, the mask is worn, need to use both hands to press the two sides of the nose bridge metal strip, so that the upper end of the mask close to the nose beam, and then stretch the mask down, so that the mask does not leave folds, it is best to cover the nose and mouth.

(4) The last step is also the metal strip problem mentioned above. After wearing the mask, you need to press the metal strip on both sides of the nose with both hands, so that the upper end of the mask is close to the nose, and then stretch the mask downward, so that the mask does not leave wrinkles. It is better to cover the nose and mouth.