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超级杂草
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超级杂草
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超级杂草
广义指所有极其难以控制的杂草。狭义特指获得了抗除草剂转基因而演变为单一除草剂难以控制的杂草类型。
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unalloyed building structure steels
unalloyed cast steel
unalloyed cold-heading and cold-extruding steels
unalloyed free-cutting steel
unalloyed machinery steels
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unalloyed quality steel
unalloyed section steel for construction
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unalloyed steel
unalloyed steel for boiler and pressure vessel
unalloyed steel for concrete reinforcement
unalloyed steel for covered electrode and welding wire
unalloyed steel for high performance building structure
unalloyed steel for railway wheels
unalloyed steels for engineering structures
unalloyed steels for railway axles
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unannealed
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