.lds-dual-ring:after {
    content: " ";
    width: 18px;
    height: 18px;
    border-radius: 50%;
    border: 2px solid #fff;
    border-color: #fff transparent #fff transparent;
    animation: lds-dual-ring 1.2s linear infinite;
    display: inline-block;
    margin: 0 0 0 15px;
    vertical-align: text-bottom;
}

.machines-results-list.lds-dual-ring {
    text-align: center;
}
.machines-results-list.lds-dual-ring:after {
    border: 4px solid #505050;
    border-color: #505050 transparent #505050 transparent;
    width: 70px;
    height: 70px;
}

@keyframes lds-dual-ring {
    0% {
        transform: rotate(0deg);
    }
    100% {
        transform: rotate(360deg);
    }
}