Bad stiches # ម៉ាស៊ីនស្រះក្បាលថ្នេរធូរ

button hole machine broken thread skip stiches bad stiches and using the spring not correct for press on the thread at tension , the main point is on the stiches and adjust for changing the soft spring out and also use hard spring for instead. # awsome teaching# awsome video # amazing teaching video# factory work skills#