How Does The Toothpaste Get Into The Tube? - តើថ្នាំដុសធ្មេញ

Do you know how toothpaste gets into the toothpaste tube?តើអ្នកដឹងទេថាថ្នាំដុសធ្មេញចូលបំពង់ថ្នាំដុសធ្មេញដោយរបៀបណា?Your purchase of this book supports Library For All in its mission to make knowledge available to all, equally.