51449130 (a) in brick wall [cement 3.6 kg/mtr] 22 removal of rubbish,earth etc. from the working site and disposal of the same beyond the compound, in conformity with the municipal / corporation rules for such disposal, loading into truck and cleaning the site
51270253 mechenical device that prevents free fall in case the elevator is travelling at speed more than 10 % of the rated speed in down ward direction)(n) automatic rescue device ( to rescue the passengers in case of emergency, the device will bring the car