According to the customs act, Customs duties are exempted with respect to the goods which are for charitable purposes or countries' defence need related equipment. every country has a different import and export policy.
You have to obtained import license and in the meanwhile you may take guidance from import and export consultant.
You may approach import and export advisor and it seems you have to obtain import and export license.
Since you are a consultant you should be the best person to tell this. You are suggested to look all the repositories of the Custom and find out the applicable duties on such machineries. If they fall under the category of exempted goods then you can otherwise you can not.