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About product and suppliers:
        Alibaba.com offers 6,821 manual fuel products. About 1% of these are boilers. 

A wide variety of manual fuel options are available to you, such as fire tube, water tube. You can also choose from horizontal, vertical. As well as from free samples, paid samples. 

There are 6,821 manual fuel suppliers, mainly located in Asia. The top supplying country is China (Mainland), which supply 100% of manual fuel respectively. 

Manual fuel products are most popular in Southeast Asia, North America, and Domestic Market. 

You can ensure product safety by selecting from certified suppliers, including 3,262 with Other, 1,888 with ISO9001, and 276 with ISO14001 certification.