揑

Then roll the edges, pinching them to seal.

擀开边缘，再揑紧封口。

Caution with edge of sheet. After using this sheets, wash hands.

小心以手揑住胶带内蕊及边缘，用后以清水洗净双手。

It´s your feeling, you feel the thickness, like this: [gestures by putting thumb and index finger together].

用你的感觉，感觉木板的厚度，像这样：【做出把拇指和食指揑在一起的姿势】。