... ton is 50t Chain hoist: The HSZ Chain hoist is easily operated by hand chain, it is suitable for use in factories,,mines,farms ... attached to a trolley of any type as a traveling chain block .It is suitable to monorail overhead conveying system , ... jib crane.Five prominent features in design and in service ate inherent in HS Services chain Block: 1)Safe,reliable in operation with minimummaintenance.2 ...