freepeople性欧美熟妇, 色戒完整版无删减158分钟hd, 无码精品国产vα在线观看DVD, 丰满少妇伦精品无码专区在线观看,艾栗栗与纹身男宾馆3p50分钟,国产AV片在线观看,黑人与美女高潮,18岁女RAPPERDISSSUBS,国产手机在机看影片

正文內(nèi)容

刮板運(yùn)輸機(jī)外文資料翻譯-其他專(zhuān)業(yè)-文庫(kù)吧資料

2025-01-27 07:45本頁(yè)面
  

【正文】 ve, scraper chain and the position of such pieces. Rear scraper plane for the return of the device chain. Traction mechanism is a scraper chain, bearing device is the middle trough of scraper chain, mounted in the middle groove groove face. The central groove along the transport route laying across the board, a scraper chain around the nose, tail sprocket connected into a closed shape in the middle groove, and drum shearer and the conveyor over devices, implementation of falling coal, coal, coal and passage transport mechanization. Conveyor along the full length has to be in coal chute, into the middle groove in coal scraper chain drag, in the central groove sliding to unload unloading terminal. Scraper conveyor What is
點(diǎn)擊復(fù)制文檔內(nèi)容
畢業(yè)設(shè)計(jì)相關(guān)推薦
文庫(kù)吧 www.dybbs8.com
備案圖鄂ICP備17016276號(hào)-1