... balancer via the energy of the spring let the
tools which hanging on it free weight. To reduce ... model is SW1-3 and SW3-5. The
self-
locking function is means when you pull and unloose the ... will keep still. Not up and down. The
self-
locking spring balancer stroke is 3.0 meters, and the ... have stock, or depended. Shan Dong Finer Lifting
Tools co.,LTD Email:
[email protected] http://www.cargotrolley.com ...