[山清水秀]

ibf.ft是常用扭矩单位，但是谁知道其中的ibf的英文全拼是什么呢？请教高人指导一下，谢谢了！

[sandstone]

It is probably "lbf", not "ibf".

lbf ~ POUNDS-FORCE

[山清水秀]

you can look this,it's really "Ibf" ,I have asked many people,but nobody knew it!who can help me? maybe this is a easy question!

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[sandstone]

引用框（山清水秀 ＠ 2009-04-06）

you can look this,it's really "Ibf" ,I have asked many people,but nobody knew it!who can help me? maybe this is a easy question!

Well, if you check the table you posted, you will see 'lbf' rather than 'Ibf'. It is weired for a unit to have capital letter at beginning.

Dont spend your valuable life on this. It is a typo.

[ytlee]

lbf is a pound force.

[ytlee]

引用框（山清水秀 ＠ 2009-04-06）

you can look this,it's really "Ibf" ,I have asked many people,but nobody knew it!who can help me? maybe this is a easy question!

If you look at other unit, ozf, kgf, they are in weight unit. Also divide the ozf by 16, what will you get. I will let you do the math and make your own finding.

BTW, your image clearly shows "l', insteady of "I" as in "i'. I hope you understand the difference or you need to get a new set of 'many people' to help you in english.

[山清水秀]

引用框（ytlee ＠ 2009-04-06）

If you look at other unit, ozf, kgf, they are in weight unit. Also divide the ozf by 16, what will you get. I will let you do the math and make your own finding.

BTW, your image clearly shows "l', insteady of "I" as in "i'. I hope you understand the difference or you need to get a new set of 'many people' to help you in english.

thank you!you are so scrupulous and i will study English hard!

[ytlee]

' i will study .... hard" is chinese english. You should put more effort in studying english because the usage of "scrupulous" is incorrect.

In communication, try to avoid big word like "scrupulous" which is a mouthful of vowels, a simplier word like 'right" or "strict' will do a better job.

[wavesurfer]

引用框（山清水秀 ＠ 2009-04-05）

ibf.ft是常用扭矩单位，但是谁知道其中的ibf的英文全拼是什么呢？请教高人指导一下，谢谢了！

1 pound-force ≡ 0.45359237 kg × 9.80665 m/s2
= 4.4482216152605 N (exactly)
= 32.17405 lbm·ft/s2

For more information, try the following link.

http://en.wikipedia....iki/Pound-force