As there's more requirement for hinge connecting, strict control was carried overcooling temperature and rate, further reducing cost and making peg more durable.
由于铰链连接要求高，严格控制了模具温度和冷却速度，使成本进一步降低，衣夹更耐用。
2
Successful heat treatment requires close control over all factors affecting the heating and cooling of a metal.
热处理要想顺利进行，必须对所有影响金属加热与冷却的因素进行严格控制。
3
The crew of the International Space Station have been forced to reduce power after half the cooling system suddenly shut down over the weekend.