standard specification for precast concrete septic tanks预制混凝土: precast concrete化粪池: septic-tank; digestion tank预制混凝土 预制混凝土构件: precastconcrete预制混凝土板: precast concrete plank; precast concrete slab预制混凝土盖: precast concrete cover下载手机词典可随时随地查词查翻译关注微信公众号：chachacidian，回复:预制混凝土化粪池，即可在微信中查询翻译
