头部开枪管内的两端均为结束之前关闭帽圆柱形，纵缝法兰压在头管的两端安装。
The head tube contains shot and the ends thereof are closed by end caps having cylindrical, longitudinally-slotted flanges press-fitted in the ends of the head tube.
头部开枪管内的两端均为结束之前关闭帽圆柱形，纵缝法兰压在头管的两端安装。
The head tube contains shot and the ends thereof are closed by end caps having cylindrical, longitudinally-slotted flanges press-fitted in the ends of the head tube.
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