The design service life is based on the precondition of G-L Layer failure not occur, on the normal condition of balanced operation and routine maintenance.

设计使用寿命是指在正常平稳操作及正常维护条件下，基于搪瓷层没有产生失效的这一前提下所确定的容器使用寿命。

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The paper deduces the form and the operation method of pro memorial (L), journal ledger and branch account, which were prevalent in Venice 500 years ago.

演绎500年前流行于威尼斯的备忘簿、日记帐簿和分类帐簿的格式和操作方法，有助于重新认识《簿记论》的学术价值；

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Symmetric Gear Reducers from F. L. Smidth are famous for their impact structure, operation reliability, long service life and high efficiency. Therefore many sets are imported in recent years.

丹麦史密斯公司的对称齿轮式减速机以其结构紧凑，运行可靠，寿命长，效率高著称，近年来引进较多。

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The L-Fn (Lens Function) button suspends the autofocusing operation temporarily to avoid unintended focusing on obstacles that appear suddenly between the camera and the subject.

ENGADGET: Olympus unveils a cavalcade of point and shoot cameras and a PEN lens at CES

"We deliver the required power at a certain point, we put a meter on this particular point - that means they will be responsible for the operation and maintenance of the system, " said Dr Janak L Karmacharya, head of the Nepal Electricity Authority (NEA).

BBC: NEWS | South Asia | 'Minigrids' solve South Asia power crisis