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ҽѧ*Ҫ

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ҽѧ*Ҫ

һҽѧרҵ 1ܲⶨ 2 3 Ҫ 1500-800 m? PET ϻ ϣ 500m? 2ѡַҽѧ 3 ࿪ͷԹ ҽԺһ㽨ڣӦڽһ˻һ 㣬ǷԿԸ룬еڣԶơ ơӪƵȲš 3вԱר䡢Ա꼰䡢 ˮϵͳʽҺ˥أ63 Oң й˥ أ10m? ң ܵҪΧ 50m ߣ߳ 3m 4÷ְԭ򻮷ԣ мȾ 5ȾǽҪͿ㣬Ŵ 6жԽӡ㲥ϵͳ

7ݷ棬½ġԹ ĿѡַƱ뱨ڵ ͬ⡣ʡպϸȡ ֤á 1칫 3 䣨ΰ칫ҡڰ칫ҡ 칫ң ʾ 1 䡢Ŵ 1 䣬Ŵ 1 䡢ܶ 1 䡢ݴ 1 䡢ѧ 1 䣨 С 40 O 1 䡢ֵ 1 䡣 2мһҡҡü ҡҡϴҡԼҡ 3ȾԤԼǼҡECT ҡECT 2 䣨С 30 O/䣩 ฺҡעҩҡ ߻ҡƲ2-4 Ŵλ ҡӴҡ Աר䡢Ա估ϴԡ䡣




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