| file_name,ground_truth | |
| image1.png,"Guillotine shears are provided with two straight blades of adequate length made of die steel. The blades are hardened and finished by grinding to give smooth and sharp edges. One blade is fixed to theram (which is much longer in case of guillotine shear), while the other one is fixed to the edge of the machine bed. The sheet is placed on machine bed with one end projecting. It is held down by clamp. When the ram moves down, the blades shear the sheet along the blade length. Steel plates up to 10 mm thick canbe sheared in this way on 250 tonne presses. No sheet-metal shop is complete without a guillotine shear." | |
| image2.png,Cupola consists of a long cylindrical steel shell with its interior lined with refractory fire-bricks. It is erected vertically up and rests on short pillars about 0.85 metres above the ground level. The bottom of the cupola is provided with steel doors which are also lined with fire resistant material andcovered with a layer of good quality sand. | |