The permanent waterproof measures of Beijing Metro are very important to ensure no seepage and leakage axed to satisfy transportation safety and structure operational life requirements.
为确保地铁结构不渗不漏，满足运营安全和结构使用年限要求，做好地铁结构永久防水至关重要。
This effectively reduces leakage of propellant while enhances the safe- ty of aerosol products by avoiding propellant leakage during production, transportation and usage.
可消除气雾剂在生产、储运、使用过程中因抛射剂泄漏而造成的安全隐患，提高气雾剂产品的安全性。
Zero leakage: hard alloy seal with different materials ensures zero leakage for transportation of different media.
滴水不漏：不同材质的硬质合金密封，保证了不同介质输送均无泄漏。
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