A 35-year-old woman, a polisher, complains of chills, cold bluish fingertips, low mobility of her hand joints, and a contracted sensation in the skin of her face and hands. Examination detects amimia. pouch-like pursing of the mouth, thickened skin of checks and hands, pale and cold fingertips. A bandbox resonance and isolated fine inspiratory crackles can be heard over the lungs. Blood test shows the following: erythrocytes - 3.8 × 1012/L, leukocytes - 4.8 × 109/L, ESR-45 mm/hour. CRP++. What is the most likely diagnosis in this case?