虽然承包商打算给自己留一年的余量，但现阶段的目标是在2014年之前完成新一代安全保护罩的建设。
Currently, the goal is tofinish the New Safe Confinement by 2014, although contractors are givingthemselves a year leeway.
外形含非对称结构可以锻出，零件外表面单边留少许余量即可。
Shape with an asymmetric structure could (forge) out, spare parts the outer surface of unilateralism can leave a little headroom.
而中央空调机组是以满足使用场所的最大冷热量来进行设计的，并且留10% - 20%设计余量。
The central air-conditioning set is designed for meeting the maximum heating and cooling capacity of the site, and with a 10% to 20% design surplus.
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