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H/H
abbr.	House to House
abbr., ed.	Hospital/Homebound
abbr., insur.	Le Havre to Hamburg inclusive or Le Havre-Hamburg range of ports
abbr., interntl.trade.	house to house container
abbr., logist.	half height container
abbr., med.	Hematocrit and Hemoglobin
abbr., oil	host to host
immunol.	hematocrit and hemoglobin
H.H.
abbr.	Her Highness (Tiny Tony); His Highness (Tiny Tony)
abbr., earth.sc.	heavy hydrogen
abbr., met.	handhole
H&H
abbr., med.	Hemoglobolin and Hematocrit; hematocrit and hemoglobin
abbr., oil	hardened and honed
H.&H.
abbr.	Horn and Hurlstone's Exchequer Reports
H.h.
abbr.	half hard
abbr., earth.sc.	half-hard
h/h
abbr.	house-to-house
H & H
abbr., med.	hematocrit and hemoglobin
h/h
insur.	Hatch/hold or hold/hatch
H H
abbr., earth.sc.	hydrology and hydraulics

H.H: 12 phrases in 4 subjects

Abbreviation	8
Military	1
NASDAQ	2
United Kingdom	1