- 30
- Sep
চীনে ভার্নিয়ার ক্যালিপার প্রস্তুতকারক
Calipers are used to determine the depth of the holes. The measuring rod has a main and an auxiliary scale (vernier for measuring fractions).
Calipers are used to determine the depth of the holes. The measuring rod has a main and an auxiliary scale (vernier for measuring fractions).