Fastening part, slide fastner, and manufacturing method for fabric with fastening part

A slide fastener comprising:

• left and right fastening parts;
• and
• a slider capable of moving frontward to engage the left and right fastening parts and moving rearward to disengage the left and right fastening parts;
• wherein
• the left fastening part is an elongated part in front-rear direction and sewn directly or via an intervening member by a sewing thread to a left rim of an open section of an article to which the slide fastener is attached, the left fastening part including at least one left line of engagement elements including left engagement elements arranged along the elongation direction of the left fastening part, and the left engagement element protruding rightward on the opposite side of the left rim of the open section;
• and
• the right fastening part is an elongated part in the front-rear direction and sewn directly or via an intervening member by a sewing thread to a right rim of the open section of the article, the right fastening part including at least one right line of engagement elements including right engagement elements arranged along the elongation direction of the right fastening part, and the right engagement element protruding leftward on the opposite side of the right rim of the open section.