Detail specification for short stroke keypads 短行键区的详细规范
2.
Sweep flame around tube in short strokes up and down at right angles to run of tube 垂直环绕着管道上下来回短促扫着火焰。
3.
1 . angle the bristles at approximately 45 degrees against the gum line . gently brush from the gum line to the chewing surface in short strokes 1前牙外表面握住牙刷，使其与牙成45度角，轻柔地来回刷牙。
