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- ww1317405 2008-03-21 00:00:00
- punch 就可以了
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- YH椰晖旅游 2008-03-21 00:00:00
- punch(用打孔机) punch punch 1 AHD:[p¾nch] D.J.[p(nt.] K.K.[p(nt.] n.(名词) A tool for circular or other piercing: 打孔器:用来进行球形或其他形式穿透的工具: a leather punch. 穿皮革器 A tool for forcing a pin, bolt, or rivet in or out of a hole. 起压钉器:一种把钉、锞栓或铆钉打入或拔出小孔的工具 A tool for stamping a design on a surface. 压印器:一种在表面上打印出图案的工具 A tool for making a countersink. 做螺丝钉孔的工具 v.intr.tr.(不及物动词和及物动词) punched, punch.ing, punch.es To use a punch or use a punch on. 使用打孔器或用打孔器在…上打孔
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热门问答
- 翻译 打孔机 用英文正确的说法
2008-03-20 10:48:29
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- 离心玻璃棉的英文说法?
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2006-06-10 23:02:30
267
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- 翻译以下英文:
- The standard error of the mean (SEM) is a measure of how far your sample mean is likely to be from the true population mean. The SEM is calculated by this equation:SEM=SD/N. With large samples, the SEM is always small. By itself, the SEM i... The standard error of the mean (SEM) is a measure of how far your sample mean is likely to be from the true population mean. The SEM is calculated by this equation:SEM=SD/N. With large samples, the SEM is always small. By itself, the SEM is difficult to interpret. It is easier to interpret the 95% confidence interval, which is calculated from the SEM. 展开
2007-11-15 02:56:39
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2013-05-31 06:01:52
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2012-12-16 02:29:03
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2013-08-07 14:40:15
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2012-04-21 10:55:01
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- Whilegraphene,acarbon-basedtwo-dimensionalnanomaterials,hasreceivedanupsurgeofinterest,[1]self-assemblyofsmallorganicandorganometallicmoleculesinto2Dnanostructurescouldal... While graphene, a carbon-based two-dimensional nanomaterials, has received an upsurge of interest,[1] self-assembly of small organic and organometallic molecules into 2D nanostructures could also be harnessed to develop new classes of functional supramolecular nanomaterials.[2] In principle, quasi-2D lamellae or nanosheets are planar structures having a thickness less than 100 nm and lateral dimensions a few orders of magnitude greater than their thickness. Control over the bilateral intermolecular noncovalent interactions is anticipated to organize small molecules into regular 2D nanostructures, which has been a formidable challenge yet to be achieved. Recently, Shelnutt and co-workers obtained discrete porphyrin nanosheets reprecipitated from their solutions;[3] Sathish and co-workers constructed hexagonal C60 nanosheets using a liquid–liquid interfacial precipitation method;[4] the groups of Yao[5] and Hu[6] prepared singlecrystalline nanosheets of polycyclic aromatics using a surfactant- assisted reprecipitation and a physical vapor transporting method, respectively; and Zhang and co-workers suggested that molecules with intramolecular charge-transfer dipole moments could be grown into quasi-2D nanostructures.[7] Moreover, some amphiphiles and organogelators were found to self-organize into sheet-like nanostructures in contact with solvents.[8] Despite these advances, templateand surfactant-free synthesis of free-standing, crystalline, and optoelectronically active nanosheets from small molecules remains elusive. 展开
2010-03-06 01:33:12
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2010-07-05 09:53:28
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2017-12-24 00:11:29
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- 求助,英文文献翻译~
- PMMA has good compatibility with PVC due to specific interaction of a hydrogen bonding type between carbonyl groups (C=O) of PMMA and hydrogen from (CHCl) groups of PVC (Belhaneche-Bensemra et al., 2002; Ramesh et al., 2002). Zhou et al... PMMA has good compatibility with PVC due to specific interaction of a hydrogen bonding type between carbonyl groups (C=O) of PMMA and hydrogen from (CHCl) groups of PVC (Belhaneche-Bensemra et al., 2002; Ramesh et al., 2002). Zhou et al. (2001) studied the relationship between the coating thickness of PMMA on the surface of talc and mechanical properties of PMMA-g-talc/PVC composites, and found that there existed a critical thickness. Xie (2001) found that the PMMA coating on talc improved the dispersion of talc in the PVC matrix and enhanced the interfacial adhesion between talc and PVC. There appears to be a critical coating thickness of PMMA on the talc surface for optimum toughening. Quan et al. (2002) reported improved toughness and intension of the PVC composites filled with CaCO3/ACR core-shell complex particles prepared by in-situ emulsion polymerization of acrylic ester. In the present work, PMMA coated on the surface of CaCO3 nanoparticles by in-situ emulsion polymerization was characterized by FT-IR and 1H-NMR. The effects of PMMA thickness and particle fraction on the mechanical properties of PMMA-coated CaCO3 /PVC nanocomposites were also investigated. 展开
2011-05-16 04:20:15
443
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- 求助,英文文献翻译!
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2011-05-16 00:26:36
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2014-12-28 15:14:51
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