It's reported that the British House of Commons passed a bill February 14 to ban smoking in every pub, club and indoor public space in England. The legislation is now submitted to the upper House of Lords. If pass...It's reported that the British House of Commons passed a bill February 14 to ban smoking in every pub, club and indoor public space in England. The legislation is now submitted to the upper House of Lords. If passed, it will become law by mid-2007. With the ban, Britain joins Ireland, Finland, Italy, New Zealand, Norway, South Africa, Spain, Sweden and several U.S. states and cities, all of which have restricted smoking in public places in recent years.展开更多
This article introduces the history and development of log grapple in China.Ac-cording to the special conditions of Chinese forest areas,we have selected log grapple driven byelectric drum,and have analyzed and calcul...This article introduces the history and development of log grapple in China.Ac-cording to the special conditions of Chinese forest areas,we have selected log grapple driven byelectric drum,and have analyzed and calculated its parameters theoretically.This is the first loggrapple driven by an electric drum made successfully in China.The Model DZ1 log grapple has alarge closing force,works safely and is suitable for the special forest working conditions inChina.展开更多
This paper study on grabbing moving resistance and performance of double-power screw driving grapple with vibration in the grabbing logs. Applying the vibration mechanism can reduce the grabbing moving resistance when...This paper study on grabbing moving resistance and performance of double-power screw driving grapple with vibration in the grabbing logs. Applying the vibration mechanism can reduce the grabbing moving resistance when the grapple grabs logs. According to this principle, we have developed the contruction of this double-power screw driving grapple with vibration. It has great significance for increasing efficiency and decreasing dead-weight of grapple(grab bucket).展开更多
文摘It's reported that the British House of Commons passed a bill February 14 to ban smoking in every pub, club and indoor public space in England. The legislation is now submitted to the upper House of Lords. If passed, it will become law by mid-2007. With the ban, Britain joins Ireland, Finland, Italy, New Zealand, Norway, South Africa, Spain, Sweden and several U.S. states and cities, all of which have restricted smoking in public places in recent years.
文摘This article introduces the history and development of log grapple in China.Ac-cording to the special conditions of Chinese forest areas,we have selected log grapple driven byelectric drum,and have analyzed and calculated its parameters theoretically.This is the first loggrapple driven by an electric drum made successfully in China.The Model DZ1 log grapple has alarge closing force,works safely and is suitable for the special forest working conditions inChina.
文摘This paper study on grabbing moving resistance and performance of double-power screw driving grapple with vibration in the grabbing logs. Applying the vibration mechanism can reduce the grabbing moving resistance when the grapple grabs logs. According to this principle, we have developed the contruction of this double-power screw driving grapple with vibration. It has great significance for increasing efficiency and decreasing dead-weight of grapple(grab bucket).
