.company1 {
    background-image: url(https://www.roller-cutter.com/img/company/company1.jpg);
}
.company2 {
    background-image: url(https://www.roller-cutter.com/img/company/company2.jpg);
}
.company3 {
    background-image: url(https://www.roller-cutter.com/img/company/company3.jpg);
}