roller feed meaning in English

槽轮排种器
辊式排肥器装置
辊式送料
滚珠进给
滚子送料；滚柱进给

Model gk39 high - speed bag sewing closer is adopted a special part , which the needlecan move together with the looper . the machine is equi pped with aluminum alloy house , gear running , needle bar and looper system to form double - thread chain stitch . the main running parts are adopted bearing and the machine has the special design such as automatic oil dripping lubrication system , roller feeding and needle feeding in step having the automatic cutting system
说明：本机gk39为高速封包缝纫机，是唯一采用“纫针机构”针同步的封包缝纫机，采用铝合金外壳，轮传动，针杆挑线和弯针勾线，组成双线链式线迹。主要转动部位采用轴承，并配有自动滴油润滑油路。