双层

Based on the revision suggestions of Technical Specification for Heat-Insulation and Wear-Resistant Lining SH3531-1999, main amendments in new edition Technical Specification for Heat-Insulation and Wear-Resistant Lining SH3531-2003 are expounded as follows:(1) The negation of double layer lining without testudinate net and further affirmation of single layer lining.

针对《隔热耐磨混凝土衬里技术规范》SH3531-1999版提出的修改意见，介绍了新版衬里规范SH3531-2003设计部分的主要修改之处：对无龟甲网双层衬里的否定及单层衬里的进一步肯定，衬里插入管、锚固件等有关结构的改进，厚度计算公式的修改及衬里材料化学成分的要求等。

The authors explain a double layers and plane valley electron density profile.

介绍了一种双层平谷电离层电子密度模式。

On the next play double lights, and to provide you with better service.

上、下双层灯光打位，为您提供更优质的服务。

This durable, all purpose product has a double ply, grey polyester vapor barrier with spiral reinforcements.

这种持久的，通用的双层产品，具有灰色聚酯防潮层以及螺旋加固层。

Powder metallurgy gears include: bevel gear, dual-gear, gear box gears, planetary gears, ring gear, rack, sector gears, bevel gears, spur gears, sun gear, helical gear, gear shaft, flat gears, spur gears, double layer gear, synchronous pulley, helical gear, sprocket, ratchet, multi-gears, micro-gear, small modulus gear, special gear, differential bevel gear, reducer gears, variable speed gear motor, all kinds of precision gears.

粉末冶金齿轮包括：伞齿轮、双联齿轮、齿轮箱齿轮、行星齿轮、齿圈、齿条、扇形齿轮、锥齿轮、直齿轮、太阳齿轮、斜齿轮、齿轴、平齿轮、正齿轮、双层齿轮、同步轮、皮带轮、螺旋齿轮、链轮、棘轮、多层齿轮、微型齿轮、小模数齿轮、异形齿轮、差速伞齿轮、减速机齿轮、变速电机齿轮、各类精密传动齿轮。

For a fixed particle volume, the influences of the key parameters of the system under consideration, including the thickness of double layer, the aspect ratio of a particle, the relative size of a cylindrical pore, and the charged conditions on the particle and pore surfaces, on the on the mobility of the particle are discussed.

首先，我们先固定所有粒子的体积大小，然后再改变不同的电双层厚度、粒子与边界本身带电与否、管径的大小以及粒子或边界本身带电情形的不同，分别将这些因素作用在不同椭球粒子上，并根据其相对所产生的泳动率之大小做讨论。

In order to test the efficient and possibility of the method, main vibration features about space double layer has been calculated based on this method, comparing this with the precise solution of finite element method,...

为检验这种方法的有效性和可行性，用这种方法计算了空间双层子结构的主要振动特性，并将所得结果与有限元精确解进行对比，表明了这种方法不仅适用于简单对接情况也适用于高度赘余连接的情况，并且具有良好的综合精度。

Anti-static design Blow-out proof stem Pressure balance device on the ball Double stem packing and two-pieces shrapnel device Clearance device on the body

阀杆防爆出装置。◇钢球上设计有压力平衡孔。◇双层阀杆填料与两片蝶性弹片装置。◇阀体上设计清洁阀腔装置。

Isolierwerke papierhygiene and Board have impregnated paper insulation, power cable and telecommunication cable, semiconductor cable, telephone, paper, electrical pressboard, volume barrellike papers, Electrolytic Capacitor paper, kondensatoren paper, wrinkles, polyester composite cable insulation, double double density stem Electrolytic Capacitor paper, 110 ~ 330 kV high voltage cable, kV cable, capacitor professional card paper, battery separator paper, H-level electrical papers, macherent, battery separator go-50kV electric preimpreg papers, interturn papers, papers-paper sleeve 50kV, the insulation crepe paper, untreated liner board.

电气绝缘用纸和纸板有浸渍绝缘纸、电力电缆纸、通讯电缆纸、半导体电缆纸、电话纸、电绝缘纸板、卷缠绝缘纸、电解电容器纸、电容器纸、皱纹电缆纸、聚酯复合绝缘纸、双层双密度干电解电容器纸、110～330kV高压电缆纸、500kV超高压电缆纸、瓷介电容专业卡纸、电池隔膜纸、 H级电绝缘纸、电池隔膜原纸、自熄性浸渍绝缘纸、50kV电器匝间绝缘纸、50kV油纸套管绝缘纸、绝缘皱纹纸、未浸渍衬垫纸板。

Double nickel strike for rust resistance and prolonged life.

双层镍镀层，耐腐蚀，使用寿命更长

Breath, muscle contraction of the buttocks; arch body, as far as possible to hold his head, right leg straight towards the ceiling (peg-leg knee in order to avoid muscle tension).

呼气，收缩臀部肌肉；拱起身体，尽量抬起头来，右腿伸直朝向天花板（膝微屈，以避免肌肉紧张）。

The cost of moving grain food products was unchanged from May, but year over year are up 8%.

粮食产品的运输费用与5月份相比没有变化，但却比去年同期高8％。