dart-valve bailer
带突板球阀的捞砂筒
slip socket bowl
卡瓦打捞筒的锥形座
circulating overshot
可循环泥浆的打捞筒
overshot with bow
带碗形卡瓦的打捞 筒
overshot tubing seal divider
打捞筒油管密封分压器
back-brake support
顿钻捞砂轮刹车支架
circulating slip socket
可循环泥浆的卡瓦式打捞筒
endless bed drum sander
带式进给辊筒砂光机
roller and shoe combined contact sander
辊筒－压块联合砂光机
Development and application of the LS70DB electric bailing winch
LS70DB电动捞砂绞车的研制与应用
Salvage technology of double sanding in string of well Ze 10-70X
泽10-70X井双层砂卡管柱打捞处理工艺
Development and Application of Basket Barrel Overshot of Breakage Oil Pipe in Water-Oil Well
油水井井下破损油管打捞筒研制与应用
ENVIRONMENT FOR INVESTMENT TO MINING INDUSTRY IN SARAWAK,MALAYSIA;
马来西亚砂捞越州的矿业及其投资环境
In-site masonry mortar cylinder strength test method
现场砌筑砂浆筒强度试验方法
two sanding belts top working wide sander
上辊式双辊筒宽带砂光机
They proceeded at once to extract the interior mould, clearing out the boring of the piece.
他们立时动手掘砂模，掏清炮筒。
drum ,rotating, for descaling, desanding or packing of goods
金属物品除垢、除砂或抛光转筒
Construction techniques of shaft water control by sanding and grouting at hydrostatic level
静水抛砂注浆治理井筒突水施工技术