... back substitution ==> 倒转代换,回代 back suction ==> 反吸 back surface ==> 后表面,底面,背面 ...
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Back Suction Coating Gun 反抽式涂布枪
suction back 吸力面
back pressure suction system 负压吸尘技术
back pressure dust suction 负压吸尘
suction back of a blade 桨叶片抽吸叶背
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