Two, note observation and criterion, particularly is at turn, slopeing way, branch road, top and bottom bridge etc. drive ice snow mushroom shrouding condition down, don't blindly pass.

注意观察和判断，尤其是在转弯、坡道、岔道、上下桥等处被冰雪覆盖情况下，不要盲目通过。

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Note: for mechanical seal, in most cases, due to evaporation from seal leakage of fluid leaking hole in observation, but sometimes a small amount and stable leakage is allowed.

注意：对于机械密封，在大多数情况下，由于汽化导致从密封泄液孔处观察不到泄漏，但有时少量而又稳定的泄漏是允许的。

youdao

Note: for mechanical seal, in most cases, due to evaporation from seal leakage of fluid leaking hole in observation, but sometimes a small amount and stable leakage is allowed.

注意：对于机械密封，在大多数情况下，由于汽化导致从密封泄液孔处观察不到泄漏，但有时少量而又稳定的泄漏是允许的。

youdao