This stenciled piece appeared overnight , in Cardiff , England, before being painted over the next day.

在被涂掉的前夜, 英格兰卡迪夫的这幅钢印画曾昙花一现.

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Put air though cylinder and make the flange concentric with the valve seat of valve switch.

将气缸通入气源,观察阀门开、关转轴上法兰与轴座之间的钢印对准即可.

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