safety block

基本解释

It's installed the safety inserting block and the brake instrument to guard falling.
安裝有平層停靠的安全插塊和防止墜落作用的制動裝置。
Open the stop handle to test the safety inserting block, when it stretch out, whether it can insert into the angle steel of the standard section or not.
打開平層停靠手柄，檢查安全插塊是否順利伸縮，伸出時，是否插入到標準節三角框角鋼以內。
Test the rope break safety instrument is normal or not according to article 4.5 and 4.6 of section 4, if the safety inserting block has stretch out and insert into the guiding track or not.
按照第四章第4.5條和4.6條的槼定仔細檢查斷繩安全裝置是否正常、可靠。安全插塊是否可靠伸出，插入導軌架。

Reallocating the D Block to public safety is the right thing to do and it will give our first responders a number of new capabilities.
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The public safety community believes that the block of spectrum it had been allocated is not enough to enable the type of interoperable data, video, and future voice services needed to ensure that all public safety organizations including federal, state, and local agencies could communicate during incidents.
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Later at the public safety press conference, Senators Joe Liebermann (I-CT) and John McCain (R-AZ) announced that they had, that day, introduced a bill in the Senate that also calls for the reallocation of the D Block to public safety and would provide funding using revenue from future auctions.
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