It can be add protection circle to increase protection grade: IP54.

可另加防护圈，提高防护等级为IP54。

youdao

Protection grade; Indoor using, submerged in water do not last for long.

防护等级；室内使用，不可长期浸在水中。

youdao

In addition, the fire protection grade is good, and can not be burnt under the condition of heat.

另外防火等级好，能够在热的条件下不燃。

youdao

And then there seems to have been a third hedge taken out, described in today's Wall Street Journal as "protection on investment-grade bonds" - which appears to have been protection against the risk that the second hedge went wrong.

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The net exposure represents the gross exposure less liquid collateral and CDS protection purchase from investment-grade counterparties outside of these countries, Konrad explains.

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The M5M also features Plextor's True Protect unique enterprise-grade double-data protection technology.

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