The engineering practice shows that the new steel model has development value.
工程实践表明，新钢模具有推广应用价值。
The engineering practice shows: the system is easy to operate and to apply in engineering.
实践表明，该系统易于操作，便于工程应用。
The engineering practice shows: the system is easy to operate and to apply in engineering.
实践表明，该系统易于操作，便于工程应用。
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