The HSZ series chain block is a portable lifing device easily operated by hand chain.It is suitable for use in fa- ctories,mines,farms,construction sites,wharves,docks and warehouses for installation of equipment,as well as for loading and unloading goods.It is specially advantageous for lifting work in open air grounds and places where no electric power supply is available. 　 The chain block can be attached to a trolley of any type as a traveling chain block.It is suitable to monorail ov- erhead conveying system,hand traveling crane and jip crane.