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About product and suppliers:
        Alibaba.com offers 1,197 hand crank mechanism products. About 49% of these are music boxes, 8% are pencil sharpeners, and 6% are office desks. 

A wide variety of hand crank mechanism options are available to you, such as mechanical jack, mechanical, and flashlights. You can also choose from wood, metal, and paper. As well as from rectangle, square, and round. And whether hand crank mechanism is 11-20t, or 1-10t. 

There are 1,200 hand crank mechanism suppliers, mainly located in Asia. The top supplying countries are China (Mainland), India, and Taiwan, which supply 99%, 1%, and 1% of hand crank mechanism respectively. 

Hand crank mechanism products are most popular in North America, Western Europe, and South America. 

You can ensure product safety by selecting from certified suppliers, including 234 with ISO9001, 109 with Other, and 35 with FSC certification.