A float collar is placed at the top of the float joint and a float shoe placed at the bottom to prevent reverse flow of cement back into the casing after placement.
浮箍是放置于浮动接头之上的，而浮鞋则是放置于浮动接头之下，以防止水泥浆回流到套管内。
Padded Tongue and Collar for Added throughout the shoe.
增加了整个鞋的舌头和衣领加厚。
Technical advances that helped self-sufficient farming communities to be more productive became more widely adopted across Europe and this led to the development of the horse-collar, allowing more efficient haulage and plowing, the horse shoe, the mouldboard plough, allowing the cultivation of heavier northern European soils and a widespread adoption of water power in the form of water mills and tidal mills.