Riveted joints.general remarks.- riveting has been the standard method of joining plates and structural parts before welding began to replace it with increasing rapidity.rivets.-a rivet is a round bar consisting of an upset end called the head, and a long part called the shrank. the rivet blank is heated to a red glow, inserted into one of the holes , and, while the head is held firmly against the plate by a heavy sledge, the projecting end is formed into a second head, called the point, by means of a hand hammer and set or by a press.button heads are used for small rivets which are driven cold; pan heads are used chiefly in ship work; countersunk heads are used only in special cases, chiefly in structural work and below the water line in ships; the countersunk points weaken the plate so much that they should be used only when unavoidable; the others, including button heads, are used in boiler and structural work.2. выпиши из текста предложения с глаголами в форме причастия, герундийского или сослагательного наклонения.
The Cobra is famous for its hood, which is formed when a snake gets angry and is ready to attack.
Cobras can be found mainly in Africa and Asia. They typically live in hot, tropical areas.They like to spend time underground, under rocks and in trees.
They come in different colours: yellow, brown and black. Cobras eat mice, rats, rabbits, lizards, snakes, eggs and birds, but they can easely live without eating for days or months.
Like other snakes, cobras do not hear, they are death, but they can sense the ground vibrations.
Cobras lay eggs. They build nests for their eggs and guard them very carefully until babies are born.
It's interesting to know that cobras smell their prey using their tongue.