1. Constant current output characteristics,deep melting penetration,even w-elding pool,and excellent weld.
   具有恒流输出特征，熔透深，熔池均匀，焊缝成形良好。
2. Japanese import penetration.
   日本进口商品对市场的渗透。
3. Only about 5% of the initial penetrations of root cells of legumes by swarmer cells result in nodule formation.
   在最初的豆类根部细胞被细菌穿透后只有大约5%形成根瘤。
4. It's a mean of geotechnical investigation, including borehole surveying, costeaning, trenching exploration, test pitting, hole exploration, geophysical exploration and penetration sounding.
   岩土工程勘察的一种手段，包括钻探、井探、槽探、坑探、洞探以及物探、触探等。
5. Our aim is to achieve greater market penetration.
   我们的目标是进一步打入市场。
6. Modified larch tannin was prepared by grafting copolymerization and sulfoalkylation, and successfully used as retanning agent, possessing good water solubility and enhanced penetration rate.
   利用接枝共聚和磺烷基化的方法对落叶松单宁改性。
7. The pattern of fracture by impact penetration test and tensile fatigue test of thermite welding with stereoscan was observed,and the component of defect with energy spectrum was analyed.
   微观缺陷主要包括微孔和夹杂,其中微孔由微气孔和微缩孔组成,夹杂物按形态和尺寸分为团簇状夹杂、锥状夹杂、粒状夹杂、积聚物夹杂、丝状夹杂和混合形夹杂。

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