Shvalnya - a room, a room (often a separate hut) for tailors or Chebotarev. In the literature, sometimes there are mentions of this form shvalnyh work as sewing harness. Until the end of XIX century in Russia called shvalnyami garment and shoe shops, at the beginning of the XX century and later the name was used for military (regimental, military and others.) Sewing workshop.
A common description of trash - with maximum natural light spacious room, with windows on the east, south and west. Seamstresses and shoemakers located in the workplace (benches, benches) faces to the windows.
Another obsolete meaning of the word - a box, box with sewing accessories (thread, needles, etc.).