http://www.forrestrace.com/angel-bevel/

the angel at which you enter the vein should be?
a. bevel up at 15 degree angel
b. bevel up at 45 degree angle
c. bevel down at 15 degree angle
d. bevel down at a 45 degree angle
Place the needle bevel up in line with the vein and pierce the skin at approximately a 15 to 45 degree angle. (Entering with the bevel up causes the sharp tip to pierce the skin first, paving the way for the rest of the needle. Entering the vein with the bevel down will cause painful tearing of the skin.)
For all details of puncturing the vein, refer :- http://www.tpub.com/content/armymedical/MD0553/MD05530042.htm
By the way, it is ANGLE and not ANGEL
Cutting radius in travertine tile / ARCUS Masonry Blade
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Chef’sChoice AngleSelect Knife Sharpener $220.00 This 3-stage electric knife sharpener is fast and easy to use. Works on smooth, serrated, Asian and sporting knives. The angle guides keep you within a perfect 15-20 degree angle, so there’s no guesswork. Stage 1 at a 15% angle for Asian knives and Stage 2 at 20% for American and European knives hones cutlery to hairsplitting sharpness with diamond coated disks. Revolutional Stage 3 stropping/poli… |
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ORIGINAL PATENT APPLICATION NUMBER 4,216 FOR A DEVICE FOR SETTING OFF ANGELS OR BEVELS. … |