Just as a recovery needs a self-supporting cycle of rising production, income and spending, so a recession needs the opposite.
正如一次回升需要一个关于生产，收入和支出都处于上升的自给循环，对衰退来说，正是反之亦然。
To introduce technology requirement of galvanized steel wire for HYAC (self-supporting communication cable). Production process of galvanized steel wire for HYAC is explained.
介绍自承式电缆用镀锌钢丝的技术要求，说明自承式电缆用镀锌钢丝的一般生产工艺。
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