研制了皮带机和螺旋布料机具并应用于鱼跳面板堆石坝混凝土面板浇筑中。

Belt coveyer and distributing material spiral mac hi nes and implements were discussed and ap-plied to concrete plate casting of ro ck-fill dam.

youdao

他们一年花费超过一百万美元，用于鱼、鱼缸、水草、沙子、贝壳、鱼食，以及用于加热和清洁鱼缸的器具。

They also spend more than a million dollars a year for fish, tanks, plants, sand, shells, food and gadgets for heating and cleaning aquariums.

youdao

他们一年花费超过一百万美元，用于鱼、鱼缸、水草、沙子、贝壳、鱼食，以及用于加热和清洁养鱼缸的器具。

They also spend more than a million dollars a year for fish, tanks, planes, sand, shells, food and gadgets for heating and cleaning aquariums.

youdao