I folded my curtains in bellows and put them in a net to be washed.
I folded my curtains back and forth like an accordian, put them in a washing net, then put them in the washer.
ーI folded my curtains in bellows and put them in a net to be washed.
「カーテンを蛇腹状にたたんで、洗濯するのにネットに入れた」
to fold ... in bellows で「…を蛇腹状にたたむ」
ーI folded my curtains back and forth like an accordion, put them in a washing net, then put them in the washer.
「カーテンをアコーディオンのように前後にたたみ、洗濯ネットに入れてから洗濯機に入れた」
to fold ... back and forth like an accordion で「アコーディオンのように前後に…をたたむ」
a washing net で「洗濯ネット」
washer で「洗濯機」
ご参考まで！
カナダ 
