The sleeved barrels vent excess heat with each recoil, drawing coolant from a built-in tank with each barrel's return.
有套筒的炮管利用每次反冲排出多余的热量，它们在每次后退时从内置储箱中获得冷却剂。
2
Flow the oil tank by clean oil and fill it with new oil according to technical requirements on assembly drawing.
使用洁净的油冲洗油箱，根据技术手册安装图纸中的规定添加新油。
3
Technical properties of capillary tubes for glass thermometers are given and a special recuperative tank furnace for vertically drawing these tubes is described.