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We strive constantly to improve our products even after 30 years of experience with development of engineering and technical applications. We welcome any constructive opinions and ideas. We are happy to receive comments about engineering and technical issues users regularly experience, other calculation modules they use, as well as any suggestions for extensions they believe should be added to our family of products. We also appreciate any comments about the functionality of our calculations. Please, submit your comments using the form below or send us an e-mail to

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