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Tan-ūi ê miâ-chhengKì-hōKah SI tan-ūi ê koan-hē
Tn̂g-tō·, l
kong-chhioh (SI ki-pún tan-ūi)m≡ m
Fermifm≡ 10-15 m = 1 fm
x unit; siegbahnxu≈ 1.0021×10-13 m
stigma ≡ 1×10-12 m = 1 pm
Bohr poàn-kènga0; bα/(4πR) ≈ 5.291 772 083×10-11 ± 19×10-20 m
goân-chú tan-ūiau≡ a0 ≈ 5.291 772 083×10-11 ± 19×10-20 m
ångströmÅ≡ 10-10m = 0.1 nm
micronμ≡ 10-6m = 1 μm
twiptwp≡ 1/1440 in ≈ 1.763 889×10-5 m
mil; thoumil≡ 10-3 in = 2.54×10-5 m
mickey ≡ 1/200 in = 1.27×10-4 m
calibrecal≡ 1/100 in = 0.254 mm
point (ATA)pt≡ 0.013837 in = 0.351 459 8 mm
point (PostScript)pt≡ 1/72 in ≈ 0.352 778 mm
point (metric)pt≡ 3/8 mm = 0.375 mm
point (Didot; European)pt≡ 0.376 065 mm
lineln≡ 1/12 in ≈ 2.116 667 mm
line (Paris) ["ligne"]l≡ 1/12 p = 1/443.296 m ≈ 2.255 829 mm
line (Québec) ["ligne"]l (Qc)≡ 1/12 p (Qc) = 2.255 837 5 mm
barley corn ≡ 1/3 in ≈ 8.466 667 mm
finger ≡ 7/8 in = 22.225 mm
Eng-chhùnin≡ 0.0254 m = 25.4 mm
chhùn (Paris) ["pouce"]p≡ 1/12 P = 1/(36 + 11.296/12) m ≈ 27.069 949 mm
chhùn (Québec) ["pouce"]p (Qc)≡ 1/12 P (Qc) = 27.070 05 mm
stick ≡ 2 in = 50.8 mm
nail (cloth) ≡ 2 1/4 in = 57.15 mm
palm ≡ 3 in = 76.2 mm
hand ≡ 4 in = 0.1016 m
finger (cloth) ≡ 4 1/2 in = 0.1143 m
span ≡ 6 in = 0.1524 m
link (Gunter's)lnk≡ 66/100 ft = 0.201 168 m
span (cloth) ≡ 9 in = 0.2286 m
quarter ≡ 1/4 yd = 0.2286 m
link (Ramden's; Engineer's)lnk≡ 1 ft = 0.3048 m
Eng-chhioh (Clarke's; Cape)ft (Cla)≈ 0.304 797 265 4 m
Eng-chhioh (Sear's)ft (Sear)≈ 0.304 799 47 m
Eng-chhioh (Indian)ft Ind≈ 0.304 799 514 m
Eng-chhioh (Benoît)ft (Ben)≈ 0.304 799 735 m
Eng-chhiohft≡ 12 in = 0.3048 m
Eng-chhioh (Bí-kok; U.S. Survey)ft (US)≡ 1200/3937 m ≈ 0.304 800 610 m
Eng-chhioh (Paris) ["pied"]P≡ 1/(3 + 11.296/144) m ≈ 0.324 839 385 m
Eng-chhioh (Québec) ["pied"]P (Qc)≡ 1.06575 ft = 0.324 840 6 m
cubit ≡ 18 in = 0.4572 m
pace ≡ 2 1/2 ft = 0.762 m
yd≡ 3 ft = 0.9144 m
ellell≡ 45 in = 1.143 m
fathomfm≡ 6 ft = 1.8288 m
(sometimes ≡ 1/1000 NM = 1.852 m)
rod; pole; perchrd≡ 16 1/2 ft = 5.0292 m
roperope≡ 20 ft = 6.096 m
chain (Gunter's)ch≡ 66 ft = 20.1168 m
chain (Ramden's; Engineer's)ch≡ 100 ft = 30.48 m
arpent (Paris)arp≡ 180 P = 25 920/443.296 m ≈ 58.471 089 m
arpent (Québec)arp (Qc)≡ 180 P (Qc) = 58.471 308 m
cable length (International) ≡ 1/10 NM = 185.2 m
cable length (Imperial) ≡ 608 ft = 185.3184 m
furlongfur≡ 660 ft = 201.168 m
cable length (U.S.) ≡ 720 ft = 219.456 m
Eng-lími≡ 1760 yd = 5280 ft = 1609.344 m
Eng-lí (Bí-kok; Statute; U.S. Survey)mi≡ 5280 ft (US) = 5280×1200/3937 m ≈ 1609.347 219 m
hái-líNM; nm≡ 1852 m
hái-lí (Admiralty)NM (Adm); nm (Adm)≡ 6080 ft = 1853.184 m
geographical milemi≡ 6082 ft = 1853.7936 m
telegraph milemi≡ 6087 ft = 1855.3176 m
leaguelea≡ 3 mi = 4828.032 m
statute leaguelea≡ 3 mi (US) ≈ 4828.041 656 m
nautical leagueNL; nl≡ 3 NM = 5556 m
kng-bió ≡ 2.997 924 58×108 m
kng-hun ≡ 60 light-seconds = 1.798 754 748×1010 m
thian-bûn tan-ūiAU= 149 597 870.691 ± 0.030 km
spatS≡ 1012 m = 1 Tm
kng-tiám-cheng ≡ 60 kng-hun = 1.079 252 848 8×1012 m
kng-ji̍t ≡ 24 kng-tiám-cheng = 2.590 206 837 12×1013 m
kng-nîl.y.≡ c0×86 400×365.25
= 9.460 730 472 580 8×1015 m
parsecpc≈ 180×60×60/π AU
≈ 206 264.806 25 AU
= 3.261 563 776 9 ± 6×10-10 light-years
= 3.085 677 581 3×1016 ± 6×106 m

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