GQ30t-33m marine fixed crane is suitable for loading and unloading bulk cargo such as coke, coal, ore, etc. on pier ships. This crane is a four-bar linkage rack and pinion fixed crane with variable amplitude. During the variable amplitude process, the displacement trajectory of the cargo has the characteristic of being close to horizontal, and it can carry full amplitude variable amplitude with high operating frequency. The rotating support adopts an external toothed three row roller bearing, which can rotate 360 degrees and run smoothly, making it easy to use. It refers to a rotatable boom type crane with an arm mounted on the top of a vertical tower body. There are various specifications and types of tower cranes, with a lifting range of 1-15 tons and up to 25-55m. These cranes can be installed on construction sites and can be converted to fixed or used for lifting operations without modification. For certain models, large ones, a spiral or self installing measure can be used to raise or extend on their own. This crane is designed and manufactured in accordance with the "GB3811-2008 Code for Design of Cranes" and the "Code for Lifting Equipment of Ships and Offshore Facilities 2007". It can be used as both a grab bucket and a hook.