例句與造句

1. 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
   說明：本機(jī)gk39為高速封包縫紉機(jī)，是唯一采用“紉針機(jī)構(gòu)”針同步的封包縫紉機(jī)，采用鋁合金外殼，輪傳動(dòng)，針桿挑線和彎針勾線，組成雙線鏈?zhǔn)骄€跡。主要轉(zhuǎn)動(dòng)部位采用軸承，并配有自動(dòng)滴油潤滑油路。
2. It's difficult to find roller feed in a sentence. 用roller feed造句挺難的