With Groovy and its support for duck-typing, there is no casting involved.
有了 Groovy 及其对 duck-typing 的支持，将不再需要强制转换。
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This company produces engineering machinery, automobile, engine, cast iron pipe and so on casting. Produc demonstration: clamp, planet Rack, Support, bearing cap, cast iron pipe, Products and so on.
Integrated corner casting with extended side plate lamination provides extra support whilst the side access holes and wide cylinder slot ensures easy fitting and removal.