1) fume collect duct
集烟管
2) breeching
[英]['britʃiŋ] [美]['brɪtʃɪŋ]
烟道;叉形汇集管
3) breeching
[英]['britʃiŋ] [美]['brɪtʃɪŋ]
烟道;后支索烟道;叉形汇集管
5) ugitive gas collection
环境集烟