Why Choose hamac There are many concrete pump manufacturers in the market. Customers must be curious about why hamac concrete pump can stand out. Why choosehamac concrete pumps? Here I have listed some reasons of choosing us. 1. Experienced Manufacturer hamac Group has owned more than 30 years’ manufacturing experience since 1982. We have accumulated advanced technology and mature skills to upgrade our equipment to meet customers’ requirements always. Moreover, hamac has obtained CE and ISO certificates to ensure quality.