Anti-vibration apparatus for construction machines, namely, shock absorbers for machines; pneumatic door openers and closers being parts of machines; gas buffers other than for vehicles, namely, gas spring buffers being parts of machines; air buffers other than for vehicles, namely, air spring buffers being parts of machines; spiral springs being parts of machines, other than for vehicles; shock absorbing rails other than for vehicles, namely, shock absorbers being parts of machines; spring b...