其中，品种更换、栽培技术改进、施肥水平与地力变化和三因子综合作用对产量增长的贡献分别占54％、36％、15％和27％。
In the total rate, the contribution of variety change, cultural improvement, the application of fertilizer, and soil productivity was 54%, 36%, 15%, and 27% respectively.
为解决传统机械式捻线机结构复杂、更换品种时操作费时费力的问题，研究开发了捻线机多电机传动系统。
To resolve the problems of complex structure and complex change variety in traditional mechanism twister, multi-motor driving system in twister was developed.
电子多臂机的特点是速度快、效率高、更换品种方便。
Electronic dobby looms are characterized by fast speed, high efficiency and convenience forvariety changing.
该磨粉机是粉碎、筛选、超细粉分离回收的组合机组。粉末粒度可按需要任意调节，是频繁更换花色品种的理想设备。
The grinder is a combination of crushing, screening and separating, recovering tiny powders powder grains can be proper adjusted, and it's an ideal equipment.
消毒剂品种应定期更换，防止产生耐药菌株。
The different varieties of disinfectants shall be used alternatively so as to prevent the development of resistant strains of microorganisms.
卫生、水系统管理、饲料更换次数、禽种品种、垫料、系统地使用阿莫西林等因素都会对细菌的耐药性产生影响。
Hygiene, water management, number of feed changes, but also factors such as breed, bedding material, systematic use of amoxicillin influence the resistance built up of bacteria.
本机适用品种多，更换模具可制标砖、盲孔空芯砖其它异型制品。
The machine applies to varieties, molds can be prepared to replace standard bricks, blind-hole hollow brick other profiled products.
本机适用品种多，更换模具可制标砖、盲孔空芯砖其它异型制品。
The machine applies to varieties, molds can be prepared to replace standard bricks, blind-hole hollow brick other profiled products.
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