The old fixed-line telephone has been replaced by mobile phones, Short Message Service (SMS), e-mail and instant messaging (IM).
老式的固定电话早已被手机、短信息、电子邮件和即使消息（IM）所取代。
Normal production of the electrolytic tinning line at Baoshan Iron & Steel Co. Ltd. was restrained to some extent by short service life of the reflow conduct roll and frequent rush repairs.
宝钢电镀锡机组软熔导电辊使用寿命短，抢修频繁，一定程度上制约了机组的正常生产。
The utility model resolves problems that filter bags of traditional flat bag dust removers are high in load, short in service life and poor in on-line dust removal.
本实用新型解决了传统扁袋除尘器滤袋的负荷大，使用寿命不长及在线清灰不好的问题。
The utility model resolves problems that filter bags of traditional flat bag dust removers are high in load, short in service life and poor in on-line dust removal.
本实用新型解决了传统扁袋除尘器滤袋的负荷大，使用寿命不长及在线清灰不好的问题。
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