Since being launched introduction in 1962, the CH-47 Chinook has been known as the primary workhorse helicopter of the US Army. The CH-47 takes its name from the very strong Chinook winds that blow over the Rocky Mountain States and onto the plains.
HMB or Beta-Hydroxy Beta-methylbutyrate (also shown as-hydroxy-methylbutyrate monohydrate) is a byproduct of the normal breakdown of the amino acid Leucine. It is therefore a metabolite of the essential amino acid-Leucine.
  HB refers to the hardness of the pencil. In the scale H is used for harder pencils (H for hard) HH HHH HHHH all get progressively harder, and B (the B stands for black) â¦ BB BBB BBBB get progressively softer. HB pencils (#2 on the US pencil-hardness scale) are right in the middle, so the HB stands for Hard Black.f you mean what HB stands for, it's an indicator for the hardness (H) or softness (B) of the graphite and clay used. However, the B is for blackness so HB is like average/m â¦ edium grade so the full form would be Hard Black, Hard and Black, or Hard Blackness.