Create a professional fashion technical flat sketch as an editable SVG vector. The garment is a long-sleeve crew neck shirt shown in front and back view, based on the reference sketch. Requirements: Generate only clean vector line art (SVG), no raster images. Symmetrical technical fashion drawing. Thin black outlines with consistent stroke weight. Long sleeves with cuffs. Rounded hem (front and back). Back yoke across the shoulders. Crew neck rib collar. Modern relaxed fit. Include realistic garment construction details: Double-needle topstitching. Side seams. Shoulder seams. Sleeve attachment seams. Rib knit cuffs. Rib neckband. Slight fabric ease typical of premium apparel. Keep the illustration centered with plenty of white space. Export as a fully editable SVG using paths only. No colors. No textures. No shadows. No background. No human model. Technical apparel blueprint style similar to professional fashion CAD flats.

The image shows a white long-sleeved t-shirt with a black and white line drawing of the front and back of the shirt. The shirt has a classic fit and is made of a soft, comfortable material. The long sleeves are slightly rolled up, giving the shirt a relaxed and comfortable look. The black line drawing adds a subtle contrast to the white shirt, making it stand out.