常见例句双语例句2 tons of boiler is one of the most common coal-fired boiler, using bar grate, grate run small resistance; Link good cooling effect, low failure rate; Grate leak less fuel.2吨锅炉是最为常见的一种燃煤锅炉，采用横梁式炉排，炉排运行阻力小； 返回 boiler grate bar