Later, after he taught me the proper use of hammer and chisel, I began to hollow out the hull.

不一会儿，他就教我使用锤子和凿子，我又开始挖船体。

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It describes the designing, logic circuit, working principle and adjustment of the pneumatic rubber plate logic control system attached to the horizontal multiple-hollow-chisel mortiser.

详细阐明卧式多头打眼机气动膜片逻辑控制系统的设计，逻辑线路，工作原理及其调试。

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