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。
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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。
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Zero leakage: hard alloy seal with different materials ensures zero leakage for transportation of different media.