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Manual sewing machine is single thread, no bottom line is needed;
First of all, thread should be threaded according to the instructions. Finally, thread should be threaded from the inside out to the pinhole. Then, press it empty, and the thread will be eaten below, and then cloth sewing should be enough; if it doesn't work, try changing a new needle. Sometimes the needle cannot be sewed when it is modified.
Then, when the last needle is taken, it should be lifted into the presser foot, pressed onto the previous needle, tied a needle, repeated two or three times, so as not to loosen
Update time:20210427114555