The hardwoods for door and window frames are accepted as short-lived, fifty years to a century or so, and construction is designed to make replacement easy or even unnecessary.
只有门和窗框的硬木，才使用了一些时间不长(约为50年到100年或稍长)的树木。门窗结构设计得便于更换，甚至不需要更换。
It has special unitized construction which consists of the seat, disc and stem assembly, and strainer screen all together in one unit for complete replacement maintenance.
它具有特殊的整体结构，由阀座，阀瓣和阀杆总成，以及过滤器网等整合在一个整体中，完全能够进行更换维护。
Construction companies, amid other things, will be able to attach 3d printers to drones to produce on site-replacement parts for damaged elements of houses or roads.
建筑公司以及其它机构，未来能够将3d打印机安装在无人机上，为住宅或道路现场生成替换部件。
The large track maintenance machines were used in the railway engineering construction of replacement for ballast on the Guangzhou-Maoming railway line.
文章介绍了有关在广州-茂名铁路运用大型养路机械进行更换石碴施工的技术和经验。
The proper use of the construction machinery in its selection, replacement and maintenance for hydraulic oil directly influences the working reliability of hydraulic system and the operating life.
工程机械液压油的选用、更换与维护正确与否直接影响液压系统的工作可靠性和主机的使用寿命。
This paper explained the construction technology of the bearing replacement for quasi-continuous T-girder bridge and analyzed the causes of bearing disease.
本文着重介绍准连续T型梁桥支座替换工程施工技术，并分析支座病害原因。
In this paper, an easy and practical method to develop the rubber seal replacement for hydraulic transmission and control system in imported construction machines is presented.
本文对进口工程机械液压传动与控制系统中，橡胶密封件的研制，提出了一个简捷而实用的办法。
Through the comparison of the construction schemes the dewatering with open drain, replacement and dynamic compaction are used for the treatment of saturated silt ground under groundwater.
对地下水位以下较深的饱和粉土地基处理，经过方案比选，采用明沟降水，并进行部分换填加基坑内强夯的处理方法。
Through the comparison of the construction schemes the dewatering with open drain, replacement and dynamic compaction are used for the treatment of saturated silt ground under groundwater.
对地下水位以下较深的饱和粉土地基处理，经过方案比选，采用明沟降水，并进行部分换填加基坑内强夯的处理方法。
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