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leak free
auto.	无泄漏的
earth.sc.	不漏电，磁的
nautic., tech.	密封的
pack.	不漏水的; 不透气的
plast.	不漏的
leak-free [ˌliːk'friː]
gen.	密封的
el.mach.	不漏电
met.	防漏的; 不漏的
space	密闭的; 封闭的
tech.	密闭

leak free: 2 phrases in 2 subjects

Cryptography	1
Electric machinery	1