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大横杆可用于设置在立杆内侧,其长度不能小于( )。 A.5跨B.跨C.3跨D.2跨



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...ڲ,䳤ȲС3,ں͵( )...
ֹּܽܵĴڲ,䳤ȲС3,ں͵( ) A.3mB.4mC.5mD.6mȷ𰸼ؽ ȷ D ˿...
...ڲ,䳤ȲС( ) A.1B.2C.3...
ˮƽڲ,䳤ȲС( ) A.1B.2C.3D.4ȷ𰸼ؽ ȷ D ޽ ...
ȫڰϰ(4)
ȫڰϰ(4) (ڰ ʩȫ) һѡ 1.ڲ,䳤ȲС__ A. 2 B. 3 C. 4 D. 5 2....
ӱʡBలȫԱ֤鿼
A.2 B.3 C.4 D.5 ...20ˮƽڲ,䳤ȲС__...A.1 B.2 C.3 D.4 21ȫ...
ɽʡͨѶCలȫԱ
Ӧ 4 ,ҲӦ 6m 10ˮƽڲ,䳤Ȳ...A.1 B.2 C.3 D.4 11ˮƽ()Ľͷ...
2015°ȫԱA֤
A.2kN/m2 B.3kN/m2 C.4kN/m2 D.5kN/m2 ...1ˮƽڲ,䳤ȲС__...A.1 B.2 C.3 D.4 2...
2015-2016갲ȫ꾡..._ͼ
A.0.5m B.1m C.1.2m D.1.8m 18.ȳ...A.1 B.2 C.3 D.4 19.ּҵ˲...36.ڲ,䳤ȲС(B ) ...
ʡȫԱA֤˿
A.4 B.3 C.2 D.5 4ʩȫ...6ˮƽڲ,䳤ȲС__...A.1 B.2 C.3 D.4 7ƿ...
2017㶫ʡȫԱ֤C֤
Aæ 48mm(2.753.5)...9ˮƽڲ,䳤ȲС__...A.1 B.2 C.3 D.4 10...
2015ϰȫԱCģ
A.5 B.10 C.15 D.20 6...24ˮƽڲ,䳤ȲС__...A.1 B.2 C.3 D.4 25...
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