A.星形網(wǎng)絡(luò)結(jié)構(gòu) B.樹(shù)形網(wǎng)絡(luò)結(jié)構(gòu) C.環(huán)形網(wǎng)絡(luò)結(jié)構(gòu)
A.0.5~700m3/min B.1~700m3/min C.10~700m3/min
A.36~1140V B.127~1140V C.380~1140V