Closed loop soft water cooling system, 3rd generation new type cooling stave and thinner-synthetic lining have been used in bosh, belly and lower stack.
在炉腹、炉腰和护身下部区域，采用了软水密闭循环冷却系统、第3代新型冷却壁和组合薄炉衬技术。
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This is worth repeating: the synthetic 10w-30 grade oil is based on a heavier 30 grade oil while the mineral based 10w-30 oil is based on a thinner 10 grade oil.
这是值得反复来说的：全合成10w - 30是基于100度粘度更高的30粘度级基础油，而矿物油10 W - 30是基于100度粘度更稀的10粘度级基础油。