But the traditional PBXs are based on private technology and lacks of open standards, have shortages in flexibility and extensibility, needs high cost for maintenance and upgrade.
然而传统PBX采用的是专用技术，缺乏技术标准，可扩展性和灵活性差，维护成本和升级费用高昂。
This brittle aspect of existing systems is in part responsible for the high cost of system maintenance and the limitations around the number of trading partners one can manage.
现有系统的这个缺点是造成系统维护费用高和可管理的合作伙伴的数量受到限制的原因的一部分。
The cost for storage and maintenance of a functional index can be high.
函数索引的存储和维护成本较高。
It is saving time, effort, pressure, atomized, and high working efficiency, low cost, no maintenance for machines longevity advantages, such as ordinary aerosol ideal replacements.
它具有省时、省力、压力大、雾化好、工效高、费用低、不用保养维护、机器寿命长等优点，是普通喷雾器理想的更新换代产品。
The lining is easy to form, high in production efficiency, no damage to volute, and high in wear resistance. The pump has replaceable front and back pump cover for lowering maintenance cost.
本发明较已有技术衬里简单，节省能源，生产效率高，而且不会损坏泵壳，耐磨性能好，前后泵盖可单独更换，可降低用户维修成本。
Another reason for using a high-level language's to reduce maintenance costs, and in general, the cost of rework.
采用高级语言的另一原因，是为了减少维护费用，并且，一般地说，可以减少返工的费用。
It features accurate sort, high cost performance, low maintenance. And mainly is used for agriculture, food process and other applications.
设备分类精密，性价比高，维修成本低，主要应用于农业，食品加工等应用领域。
IND storage system and INSS's design goal is to satisfy users for data storage, intelligent, high performance, low cost, high scalability, high reliability and ease of maintenance needs.
IND存储系统以及INSS的设计目标是满足用户对数据存储的智能化、高性能、低成本、高可扩展性、高可靠性和易维护性的需求。
The test station has high usability and low maintenance cost, could be used for performance test of PEMFC catalyst, membrane and MEA.
该系统设计简捷、实用性强、维护方便，能满足电催化剂、电解质膜及膜电极性能测试要求。
The core of the import of high-speed motor, for a long time to adapt to the use of error-free, easy to machine maintenance, long service life, cost-effective.
进口高速核心电机，适应长时间连续使用无故障，整机保养维护简便，使用寿命长，性价比高 。
Cement concrete pavement has high strength, good stability, good durability and long service life, few daily maintenance cost and advantages for night driving.
水泥混凝土路面具有强度高，稳定性好、耐久性好、使用寿命长、日常养护费用少，且有利于夜间行车等优点。
Cement concrete pavement has high strength, good stability, good durability and long service life, few daily maintenance cost and advantages for night driving.
水泥混凝土路面具有强度高，稳定性好、耐久性好、使用寿命长、日常养护费用少，且有利于夜间行车等优点。
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