Job consists of one person into the pipe. 36 "to push the jack assembly joint placements depth of about 60 cm into the mouth without a license to work in confined spaces
Technicians assembling 1 person into the pipe size 36 "to push Jack consists of a joint position, running deep from the mouth of the pipe to approximately 60 cm without a permit to work in the air well
It consists of 1 to 36," a stick to push the joint strength of the work is far from the mouth of the tube to about 60 cm, there is no license to work in the tightest air