大多数钢瓶设计了温度升高时的泄压装置.Most cylinders are designed to vent contents when exposed to elevated temperatures.过水压保护功能,可在水压超高时自动泄压.Over the protection of water features in ultra - high pressure relief automatically.介绍了电磁泄压阀在锅炉过热装...
他们又是跳绳，又是玩接球，等着上课铃声响起。They skip rope and play catch, waiting for the bell.接球手与四分卫将会对换位置。The receiver and the quarterback are going to trade positions.我跳起来接球，结果摔了个跟头。I jumped up to catch a ball and fell over....