20 BG
4
.
40% RH, 50% RH
60% RH.
,
.
,
.
•
40% RH 60% RH.
•
±10%.
•
.
3
1
(. b).
2
(. c).
•
,
30 .
3
(. d).
4
(. e).
5
,
(. f).
6
(. g).