apparel technical flat sketch, men swim shorts, black‑and‑white line drawing only, no shading no color, factory tech‑pack style, clean outline, red annotation arrows with text labels pom‑a2 pom‑b pom‑c pom‑e pom‑f1 pom‑f2 pom‑g pom‑h, dashed lines for internal seams and pocket outlines, show waist drawstring channel, side in‑set pockets, one back patch pocket, serge seam marks, high‑contrast technical drawing for clothing manufacture, white background