The film of oil between the rings and the liner is not only essential for the lubrication but also （） achieving a gas seal.

Incorrect assembly of the seal will result in leaks the valve. A: If you install the<br/>seal incorrectly, leaks can occur around the valve. B: Incorrect assembly of the seal will result in leaks past the valve. C: If you install the<br/>seal incorrectly, leaks can occur surrounding the valve.

seal script appeared in the warring states period

I am a seal and I clap my ______.

Seal characters were the first _____ and ______characters of the nation.

With the evolution of Chinese characters, Chinese calligraphy has undergone changes in certain aspects, the correct order is ( ) A: Clerical script-- Seal script-- Running script-- Regular script-- Cursive script B: Clerical script-- Cursive script-- Regular script-- Seal script-- Running script C: Seal script--Cursive script--Clerical script-- Regular script--Running script D: Seal script--Clerical script--Cursive script-- Running script--Regular script

Seal cutting is a combination of painting, design, calligraphy and_______.

The cast iron guide-ways for （） are attached to the top section and seal off the crankcase.

According to the description, Chinese Characters have evolved through the following stages: Oracle-bone inscription, bronze inscription, big seal character, small seal character, official script, regular script, cursive script and running script.

In a purifier， the interface between the liquid seal and the oil should be positioned as close as possible to （）.