Pulleys

例句:

• Instead of the rope and pulleys Newcomen fastened a walking-beam to the end of the piston, and attached a pump-rod to the other end of the walking-beam. 鲁伯特·萨金特·荷兰. 历史性发明.
• A combination of pulleys called block and tackle is used where very heavy loads are to be moved. 伯莎M.克拉克. 科学通论.
• This seems most marvelous until we learn that the lines are pulled back and forth by pulleys at the window and at a distant support. 伯莎M.克拉克. 科学通论.
• This was an endless steel belt serrated on one edge, mounted on pulleys, and driven continuously by the power of steam through the hardest and the heaviest work. 威廉·亨利·杜利特. 世纪发明.
• Sometimes we received wine and victuals from below, which were drawn up by pulleys. 乔纳森·斯威夫特. 格列佛游记.
• An effective arrangement of pulleys known as block and tackle. 伯莎M.克拉克. 科学通论.
• In Figure 111 the upper block of pulleys is fixed, the lower block is movable, and one continuous rope passes around the various pulleys. 伯莎M.克拉克. 科学通论.
• He fastened the upper end of the piston to a rope, which passed over two pulleys. 鲁伯特·萨金特·荷兰. 历史性发明.
• At R and R′ are two pulleys connected by gut. 威廉K.戴维. 智者、化学家和伟大医生的秘密.
• By means of pulleys, awnings are raised and lowered, and the use of pulleys by furniture movers, etc. 伯莎M.克拉克. 科学通论.
• So they attached levers, pulleys, ratchets and windlasses, until at last they reached the size of the great siege cross-bows, weighing eighteen pounds. 佚名. 神奇的知识之书.
• After some consideration of the gearing question, it was decided to employ belts instead of the friction-pulleys. 弗兰克·刘易斯·戴尔. 爱迪生的生平和发明.
• In our childhood many of us saw with wonder the appearance and disappearance of flags flying at the tops of high masts, but observation soon taught us that the flags were raised by pulleys. 伯莎M.克拉克. 科学通论.

手打:梅格