This paper introduces the fundamental and characteristic of the fuel cell, analyzes the necessity and detail scheme of adding assistant energy sources to the fuel cell power generation system. considering for the special demand of the fuel cell power generation system, this paper gives out a push pull forward converter ( ppfc ) with passive and lossless dual cdd snubber circuit
本文首先闡述了燃料電池的基本原理和性能特點，分析了在燃料電池發電系統中引入輔助能源系統的必要性及
具體的配置方案，然後針對燃料電池發電系統對dc / dc變換器設計的特殊要求，提出了一種加雙cdd無源無損緩沖電路的推
挽正激變換器（ pushpullforwardconverter ， ppfc ） 。
Raw hides and skins other than furskins and leather ; leather articles ; saddlery and harness ; travel goods, handbags and similar containers ; articles of animal gut other than silk - worm gut
生皮（毛皮除外）及皮革製品及其配件；鞍
具及
挽具；旅行用物品、手提袋及類似容器；動物腸線（蠶腸線除外）製品
Raw hides and skins ( other than furskins ) and leather ; leather articles ; saddlery and harness ; travel goods, handbags and similar containers ; articles of animal gut ( other than silk - worm gut )
生皮（毛皮除外）及皮革製品及其配件；鞍
具及
挽具；旅行用物品、手提袋及類似容器；動物腸線（蠶腸線除外）製品
The workpeople, to be sure - riggers and what not - were most annoyingly slow ; but time cured that
工人們，確切地說，裝索
具的工匠們，慢得煩死人但是時間會
挽救這個。
Leather furskins articles ; saddlery and harness ; travel goods, handbags and similar containers ; artificial fur
毛皮及皮革製品；鞍
具及
挽具；旅行用物品及類似容器；人造毛皮
Leather & furskins articles ; saddlery and harness ; travel goods, handbags and similar containers ; artificial fur
毛皮及皮革製品；鞍
具及
挽具；旅行用物品及類似容器；人造毛皮
The partial least squares ( pls ) method is introduced, by which seven causal variables are filtered out from ten contigent ones to predict three kinds of customers ' post - purchase intentions
摘要對于企業來說，隨著市場的不斷成熟以及競爭的加劇，
挽留老顧客比爭取新顧客
具有更?重要的意義。
Experiment result proved, relative to complicated structure and hig h request for laying wiring of zvs series resonant full - bridges, push - pull class - e amplifier is expected more suited for high frequency high - power output ability relatively, which is suitable for popularizing
實驗證明，相對于結構復雜，布線要求較高的全橋串聯諧振逆變器，推
挽式雙e類放大器
具有更高頻率和較大功率的輸出能力，適于推廣一。
Ivar was sitting at a cobbler's bench in the barn, mending harness by the light of a lantern and repeating to himself the 101st pwalm.
埃法爾坐在谷倉里的一條補鞋匠的長凳上，在一盞馬燈旁一邊修理
挽具，一邊背誦著聖經第一百零一首贊美詩。
Then i was tethered to a harness dangling from the ceiling
接著，我被拴在一
具從天花板垂下來的
挽具上。
The farmer harnessed the horse
農夫給馬套上
挽具。
Mountaineering equipment - harnesses - safety requirements and test methods
登山運動器材.
挽具.安全要求和試驗方法
Test methods for lacing twines and tapes used as harnesses in electrical equipment
電氣設備中用作
挽具的綁束繩和帶的試驗方法
En 813 personal protective equipment for prevention of falls from a height. sit harnesses
防高處墜落的個人防護設備.座位
挽具
A hoof scooped anyway for new foothold after sleep and harness jingled
醒過來后，一隻馬蹄好歹找到新的立足點，
挽具丁零當啷直響。
Mad fanny and his other sister mrs dickinson driving about with scarlet harness. bolt upright like surgeon m ardle. still david sheehy beat him for south meath
瘋子范妮149 ，另外一個妹妹就是迪金森太太150 ，給馬套上猩紅色
挽具，趕著車子到處跑。
A noble work ! i scolded that tramdriver on harold s cross bridge for illusing the poor horse with his harness scab. bad french i got for my pains
在哈羅德陸橋上，有個車把式正虐待一匹被
挽具磨傷了皮肉的可憐的馬，我就朝他嚷了一通。
Grafton street gay with housed awnings lured his senses. muslin prints, silk, dames and dowagers, jingle of harnesses, hoofthuds lowringing in the baking causeway
平紋印花細布，穿綢衣的太太們和上了歲數的貴婦，還有發出一片叮當聲的挽具，在灼熱的街道189上低低地響著的馬蹄聲。
