老齡材 的英文怎麼說
中文拼音 [lǎolíngcái]
老齡材
英文
old tree-
Bonded composite repair technology has been proven to be very successful and practical in repairing the cracked metallic components of aircraft structures and extending the service life of aging aircrafts
摘要在修補含裂紋損傷的飛機金屬結構和老齡化飛機延壽方面，復合材料膠接修補飛機金屬結構是一門實用有效的技術。At present, china ' s timber import transportation market is not in good order. generally speaking, domestic timber fleet tonnage is rather small and ship ages tends to be too old. what is more, many old - age timber ships have extended services. therefore it is very difficult for them to compete with foreign advanced timber fleet
原木進口的繁榮為中國木材船隊提供了充足的貨源保障目前，我國原木進口運輸市場還不規范，原木運輸船舶普遍噸位較小，船齡偏大，許多老齡船已超期服役，很難與國際木材船隊相抗衡The experiment materials were sd rats. according to their developmental characteristics, we selected six groups of rats : postnatal 1 day, postnatal 3 weeks, postnatal 3 months, postnatal 12 months, postnatal 18 months and postnatal 24 months. each group included 30 rats. the results of the experiments were analyzed with the software of stat on computer
本研究以sd大鼠為實驗材料，按照其生長發育的特點分為：初生組（生后1天） 、 3周齡組（離乳期） 、 3月齡組（成年期） 、 12月齡組（開始衰老） 、 18月齡組（衰老期）和24月齡（衰老期）六組，每組30隻大鼠，實驗結果進行統計分析。The research work can be divided into two parts : 1. research on the interfacial bond of new - to - old mortars. this paper has research on the bond performance under the conditions of different curing systems, bond method aging and proportion, by means of " 8 " mould and giving preliminary discuss on the mechanism of different materials by use of sem
本文的研究工作可主要分為以下兩大方面： 1 、新老砂漿界面粘結的研究採用「 8 」字型新老砂漿粘結抗拉粘結強度的試驗方法，研究了多種界面粘結材料在不同養護制度、不同粘結方法、不同齡期、不同配比條件下的粘結性能，並利用掃描電鏡對界面微觀結構進行了分析，對各種材料粘結改性機理進行初步探討。分享友人