packless seal无: not have; there is not; be w ...填料: filling; packing; stuffing; ...密封: seal; seal up; seal airtight ...软填料密封: soft packing seal; soft stuffing-box seals填料密封: packing seal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:无填料密封，即可在微信中查询翻译
