| 摘要 |
A shoring jack or push-pull jack with an outer tubular member having an adjustable locking member attached on the upper portion thereof and an inner tubular member telescopically inserted on the adjustable locking member and outer tube assembly capable of fractional adjustment so that the required height that falls in-between the equidistant holes of the inner tube could be obtained. The opposing free-end portions of the inner and outer tubular members are provided with corresponding adjustable brace shoes that could be used for attachment and support to vertical, horizontal or even slanting formwork. |
