常见例句双语例句The second photo shows the cover in place but not bolted on.第二图为覆盖的地方，但没有螺栓上。Each check module shall have a captured spring and be accessible through a bolted cover plate.每个止回模块应该配置一个复位弹簧，并且易于从螺栓阀盖板处接触检测或维修。 返回 bolted cover