对13号上作用式车钩出现防跳作用不良的原因进行了调查分析，并有针对性地提出了改进措施和建议。
The causes to the ineffective operation of the anti creep performance of No. 13 coupler is investigated and analyzed. The measures and Suggestions for improvement are given specifically.
或者，它在十字路口的转角处，准备在你猝不及防的时候蹦出来吓你一跳，给你一个惊喜。
Or, it in the corner, prepare crossroads in unexpected jumped out when you scare you jump, give you a surprise.
杀虫剂35%甲基硫环磷乳油叶面喷施对跳甲的防效为79.2%，对地下害虫几乎无效。
The control effect of pesticide 35% phosfolan-methyl EC for mangold flea beetle was 79.2%, but it couldn't control subterranean insect pests.
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